13 best boat battery chargers

Product description

Introducing the all-new GEN5X2, our most rugged, compact, and powerful, onboard marine battery charger we have ever made. The GEN5X2 is designed to charge and maintain up to two 12-volt lead-acid and lithium-ion batteries, including flooded, gel, AGM, and deep-cycle batteries. Each 12-volt battery bank provides up to 5-amps of pure charging power, plus doubles as a battery maintainer and battery desulfator. Included is a GEN5X2 10-Amp 2-Bank Waterproof Onboard Marine Battery Chargers (120-240VAC), Self-Tapping Mounting Screws, User Guide, 3-Year Warranty and certified to UL1236, ISO 8846, and 33 CFR 183.410.



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• Multiple banks - A two-bank onboard battery charger rated a 10-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
• Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Redefined mounting - A simplified mounting system allows for quick and easy installations in any direction - even up-side-down - with an integrated anti-vibration backing to isolate shock, vibration, and noise.
• Designed for water - A fully-sealed and waterproof onboard battery charger with an ingress protection rating of IP68, but has survived brutal life cycle testing, including thousands of hours underwater.
• What's in the box - GEN5X2 10-amp 2-bank waterproof onboard marine battery chargers (120-240VAC) with a 72-Inch (182cm) DC cables with 3/8-inch (M10) eyelets and a 72-inch (182cm) Type-B AC cable, self-tapping mounting screws, user guide, and 3-year warranty.

User questions & answers

Question:	In rv i have a 12v battery for starting & another huge 12v, i assume for 12v rv appliances and lighting. can this be used to charge both at same time
Answer:	No, it is only compatible with 12V MAX* and 20V MAX* lithium ion slide pack batteries.
Question:	Does this battery stop charging automatically when the battery is fully charged
Answer:	good charger works great
Question:	Can this charger be used used to charge 2 batteries that are for 2 different machines
Answer:	I searched this and could not find a straight answer anywhere. I took a chance and bought this charger anyway. I have a LB2XR20 battery I bought from amazon and this charger worked perfect. Love it.
Question:	How many stages is this charger
Answer:	Yes, this will work.

Product description

Introducing the all-new GEN5X3, our most rugged, compact, and powerful, onboard marine battery charger we have ever made. The GEN5X3 is designed to charge and maintain up to three 12-volt lead-acid and lithium-ion batteries, including flooded, gel, AGM, and deep-cycle batteries. Each 12-volt battery bank provides up to 5-amps of pure charging power, plus doubles as a battery maintainer and battery desulfator. Included is a GEN5X3 15-Amp 3-Bank Waterproof Onboard Marine Battery Chargers (120-240VAC), Self-Tapping Mounting Screws, User Guide, 3-Year Warranty and certified to UL1236, ISO 8846, and 33 CFR 183.410.



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• Meet the all-new GEN5X3 - Similar to our GENM3, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
• Multiple banks - A three-bank onboard battery charger rated a 15-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
• Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Redefined mounting - A simplified mounting system allows for quick and easy installations in any direction - even up-side-down - with an integrated anti-vibration backing to isolate shock, vibration, and noise.
• Designed for water - A fully-sealed and waterproof onboard battery charger with an ingress protection rating of IP68, but has survived brutal life cycle testing, including thousands of hours underwater.

User questions & answers

Question:	I have two batteries hooked up in series for my trolling motor! Do i have to disconnect the battery s before i plug it in or can i leave it in series
Answer:	The batteries do not need to be disconnected as long as each charging bank is connected to your batteries in 6-volt or 12-volt increments.
Question:	Can i simply splice in a length of same gauge wire to extend the length of the cables
Answer:	yes
Question:	My application is a 36v golf cart (3 x 12v) - I'm assuming that I could use this for a battery maintainer (one "channel" for ea 12v battery
Answer:	Yes. Channel 1 to battery 1, channel 2 to battery 2, channel 3 to battery 3.
Question:	is it ok to use just 2 banks to charge two battery's when you have a 3 bank charger ? a gen 5x3 3- bank, will it hurt the charger
Answer:	The bank you don't use will not turn on because the unit will not detect a battery. You should be OK. I recently had mine connected to 2 batteries with no issues. Just added a third battery and all is well.

Product description

Professional Mariner was founded over 35 years ago with one premise; to make boating more enjoyable We pioneered a robust line of fully automatic, on-board marine battery chargers that provided the marine industry with a mainstream method of charging batteries in a short time without the need for storing or carrying portable battery chargers on-board. We haven’t looked back since.

• 2 Year
• Built-in Quality and Safety
• Energy Saver Mode
• Digital Multi-Stage Performance Charging
• Included Components: Promariner 43020 Battery Charger Prosport 20 Amp - 2 Bank
• Material Type: Plastic

User questions & answers

Question:	engine start and one thee battery house set ...so i need a 5 bank charger
Answer:	Your description is not 100%, but it sounds like you need three Banks. One for each starting battery, and one for your group of house batteries, assuming they are all tied together.
Question:	I am installing this into my sailboat. What is the 110v amperage draw
Answer:	The power consumed by any electric unit is equal to the Operating voltage V times the current I. or Power = V*I in watts. If this charger is charging 2 batteries at 12 volts each and drawing 10 amps for each battery the power used is 12 * 10 = 120 watts each. So the ideal power used would be 240 watts for the two batteries. The AC source must supply power in the same way so you need 110 volts times I amps = 240 watts. Therefore the current, I, drawn would be 240/110 or around 2.2 amps , but you never have ideal energy exchanges because of heat loss and other things. So I would think you would need to have a source that could provide at least 5 amps @ 110 volts or around 600 watts at maximum usage. Much less current is needed for trickle charging.This gives you a margin of error of over 200% so should be OK. Hope this helps
Question:	I have a single starting battery (one bank) .Then I have two deep cycle batteries in parrallel (bank 2). Do I need a 2 or 3 bank charger
Answer:	you failed to give the the voltage, type, and size of batteries, and what they are being used for, but going with the information you submited. providing all of the batteries are 12v d.c. you require a 2 bank charger, but if i were you, i would order the 3 bank charger for future battery expansion, i would connect one of the charger outputs across the neg & positive terminal of the stand alone 12v dc battery, and i would then connect the second charger output lead across the 12 v dc neg & positive terminal of one of the 2 batteries which are tied in parallel. the charger in question permits the 3rd charger output to be connected to the 3rd neg & positive post of the 3 rd 12 v dc battery which is tied in parallel. but if i were you, i would first contact the manufacture reps, before you do anything, tell them your set up, and see what they think. in any event good luck, and above all do not forget to ware the proper safty equiptment prior to doing any work on any batteries.
Question:	Does this unit have a cooling fan? Does it overheat
Answer:	No fan. Yes it over heats. Mine died after a month and MFG service and support link, nor the registration lik work on their website. Unable to get through via phone. Had to buy a new one. I went with Charles Marine charger. Superb charger. Beware of this one.

Product features

ProTournament Elite Series

• Fastest Charging Time: 4 to 8 hours

• Charges flooded, AGM and HP AGM batteries

• Available in 24A and 36A

• Available from 2 to 4 battery banks

• Battery Sizes: Group 24 to 31

• Selectable battery types

• Concealed waterproof fan provides forced air cooling for reduced temperatures and fastest charge times

• IP 67 waterproof

• Distributed-On-Demand technology maximizes charging amperages and reduces charging time

ProSport Series HD

• Fast Charging Time: 8 to 10 hours

• Charges flooded, Gel, AGM and HP AGM* batteries

• Available from 6A to 20A

• Available from 1 to 3 battery banks

• Battery Sizes: Group 24 to 31

• Updated button style battery chemistry selection

• New high efficiency design increases performance and provides a 3 yearwarranty.

• IP 67 waterproof

• Distributed-On-Demand technology maximizes charging amperages and reduces charging time

Product description

NOCO Genius smart battery chargers are some of the safest and most advanced on the market. One of our best, the G15000 15 Amp is designed to charge 12-volt and 24-volt lead-acid and lithium-ion batteries up to 400Ah. It can also effectively maintain automotive, marine, RV, lawn & garden and deep-cycle batteries. It charges 2x faster than ordinary battery chargers, can jump start dead batteries, repair damaged batteries, power DC devices and is designed to use with micro-hybrid start-stop vehicles and CANBUS electrical systems. Guided by an onboard microcomputer, the G15000 monitors battery activity for safe and efficient charging, automatically minimizes energy consumption and provides redundant levels of safety protection, including spark-proof technology, as well as reverse polarity and overcharge protection. It can remain safely connected 24/7, while its streamlined design makes it ultra-compact, portable and incredibly lightweight. The G15000 features external mounting holes and a rubberized base that avoids surface slipping and scratches, all while remaining impact, UV and water-resistant (IP44). Intuitive LED indicators provide visual state-of-charge feedback and diagnostic information, even when in maintenance mode. Designed for use on 120-volt, 50-60Hz electrical systems, the G15000 includes HD X-Connect battery clamps with detachable eyelet terminals and a 5-year limited.

• A powerful, professional grade battery charger and battery maintenance tool designed to recharge all types of batteries rapidly in workshops, garages or those you simply want the best.
• Perfect for keeping your vehicles fully charged and maintained during year-round battery maintenance or long-term storage for improved performance and longevity. Power consumption: 255 watts (Max)
• Works with all types of 12-volt and 24-volt lead-acid batteries, including wet, gel, and AGM, or any common automotive, deep-cycle, marine, or maintenance-free battery.
• Keep your battery fully charged without worry or overcharge. Simply plug-in and let our advanced charging technology automatically monitor and maintain your battery. Progressive repair mode for heavily sulfated 12v batteries.
• Use our advanced repair mode to reverse the damaging effects when batteries are left uncharged for extended periods to improve battery performance and longevity.
• Convert the battery charger into a 5-amp constant-current, constant-voltage power supply for maintaining onboard computer member during battery changes or as a DC power source.
• An optimized charge mode for safely charging and maintaining 12-volt lithium-ion batteries, and recommended with use on lithium batteries with an internal BMS.
• One of the most advanced and safest battery chargers, including spark-proof technology, and reverse polarity protection, plus backed by our 5-year and endless accessories.

User questions & answers

Question:	Which model is a maintainer and jump starter
Answer:	G15000 and G26000 both are a maintainer and Jump Starter. I verified. but you need to wait 5 minutes to JUMP START a DEAD battery vehicle. Beware, YOU CAN ONLY insert the power plug into the wall power outlet AFTER you connect the battery. When you are connected, then insert the power plug and then, PRESS the JUMP CHARGE and WAIT for 5 minutes. YOU WILL BE impressed after 5 minutes.
Question:	will it jump the engine
Answer:	Yes. It can. I verified this function. It's called 5 minutes' JUMP CHARGE. but always remember, Insert the power plug ONLY AFTER you connect the battery. when you are done connecting the + and - terminal of the battery, THEN you can insert the power plug into the wall power outlet. It will take 5 minutes to charge the DEAD battery from Zero back to LIVE enough to JUMP-START your vehicle. I approved this message. It works!
Question:	The descripition says it can jump start. Has anyone used that feature
Answer:	The G15000 features a 5 minute, 20A Jump Charge mode that can be used to rapidly increase the voltage on a heavily discharged battery. It jump starts all kinds of 12V vehicles though the process may need to be repeated two to three times for larger vehicles.
Question:	Is this actually made in the usa or assembled in the usa or made in china
Answer:	Too late I'm sure, but maybe someone else will benefit - it doesn't have a battery, you can't "charge the charger". Mains powered only. Lol. Item itself is not labeled as to location of manufacture. Purchased December 2020. As of February 2021 it's discontinued.

Product features

9 Chargers In One

Charges 12V & 24V lead-acid batteries (including AGM and more) and 12V lithium. Repairs desulfated batteries, charges in cold conditions, and has a 13.6V Supply mode. Also includes JumpCharge (see below) for starting dead batteries.

Diagnostics

Intuitive visual diagnostic tool for detecting reverse polarity, low-voltage or damaged batteries.

Recovery

Applies a high-voltage pulse charge when low-voltage, sulfation or lost capacity is detected.

CANbus

Automatically enables the charging port to charge CANbus systems.

Maintenance Plus

Keeps the battery fully charged without overcharging, indefinitely.

Optimization

Stabilizes internal battery chemistry for increased performance and longevity.

Interactive

Alters the charging process based on organic battery feedback.

Energy-Save

Minimizes energy consumption when full power is not needed.

Product description

The ProSportHD Series features a lightweight, tri-surface heatsink design. This delivers significantly faster charging through optimal cooling, while delivering true rated constant current charging amps during charge mode. Fully automatic multi-stage charging enhances battery performance while extending battery life. DC Voltage Systems: 12/24. Amps: 12. Number of Batteries: 2. AC and DC Cable Length: 6'/6'. Size: 7.9" x 10.5" x 2.9". Weight: 6 lbs. AC Plug: NEMA 5-15.

• Lightweight, tri-surface heatsink design
• Delivers significantly faster charging though optimal cooling
• Delivers true rated constant current charging amps during charge mode
• Fully-automatic multi-stage charging enhances battery performance while extending battery life
• Battery Type: Flooded, Gel, AGM
• Fit Type: Universal Fit

User questions & answers

Question:	on a 2 bank charger can i start my engine while charger is still hooked up
Answer:	Yes, but as with these LEGO games since LEGO Marvel Super Heroes, you will need a Steam account.
Question:	If I have two trolling batteries and one starter (3 all together) the 3 bank will charge them all
Answer:	Yes ,the Hand Grip Strengthener Forearm Grip Workout Kit can be used by both left handed and right handed people. Ergonomic and soft handle of hand grips strengthener is comfortable to hold. Fit for small and large hands, seniors and teens.
Question:	If you need to extend the charging leads what size wire should you use
Answer:	The hand ball is perfect for improving strength, power and speed in the wrists, fingers, and forearms. Hope it will help you!
Question:	Can this charge lithium ion
Answer:	Yes, our product is the same as the display picture, which can be used as a gift for family or friends

Product features

ProTournament Elite Series

• Fastest Charging Time: 4 to 8 hours

• Charges flooded, AGM and HP AGM batteries

• Available in 24A and 36A

• Available from 2 to 4 battery banks

• Battery Sizes: Group 24 to 31

• Selectable battery types

• Concealed waterproof fan provides forced air cooling for reduced temperatures and fastest charge times

• IP 67 waterproof

• Distributed-On-Demand technology maximizes charging amperages and reduces charging time

ProSport Series HD

• Fast Charging Time: 8 to 10 hours

• Charges flooded, Gel, AGM and HP AGM* batteries

• Available from 6A to 20A

• Available from 1 to 3 battery banks

• Battery Sizes: Group 24 to 31

• Updated button style battery chemistry selection

• New high efficiency design increases performance and provides a 3 yearwarranty.

• IP 67 waterproof

• Distributed-On-Demand technology maximizes charging amperages and reduces charging time

Product description

Professional Mariner was founded over 35 years ago with one premise; to make boating more enjoyable! We pioneered a robust line of fully automatic, on-board marine battery chargers that provided the marine industry with a mainstream method of charging batteries in a short time without the need for storing or carrying portable battery chargers on-board. We haven’t looked back since. Moroccanoil Intense Curl Cream is a leave—in conditioner. It has no hold and will not increase amount of curls but will condition wavy to curly hair, defining and refreshing curls while protecting against frizz. Digital Multi-Stage Performance Charging: Fully charge and extend the life of your batteries - automatically charges, conditions and safely maintains all batteries on board for maximum time on the water

• 2 Year Warranty
• Energy Saver Mode
• Storage Recondition Mode
• Built-in Quality and Safety
• Distributed-On-Demand Technology

User questions & answers

Question:	Does this charger come with qiuck disconnect plugs on the positive and negative terminals
Answer:	No, the charging cables are bolted directly to the battery terminals - you would have to modify your installation for quick disconnection
Question:	how long are the supplied battery wires for this unit
Answer:	Supplied with prewired 6' cables for 2 batteries. Factory extensions are available separately.
Question:	Mine did not come with a terminal that connects to a battery. Am I supposed to buy an adaptor for it
Answer:	I am in the process of returning the one i got. the model number was 43012m21, not just 43012. I contacted ProMariner and they told me that i was sent a custom model that had some female plugs on them without any adapters. I am a little annoyed because i paid more for this one than another link on amazon because this was in stock. I almost cut the cords and put on my own connectors but i felt that buying a new item i should not have to do this. you can buy the male adapters for the connectors but you would probably be paying about 15 to 20 dollars for making your own cables. amazon should be sending me the correct model currently but im hoping they dont just send me another custom model. hope this helps other people because it took some work to figure this one out.
Question:	This charger comes with Intense Curl Cream? Where are the charger spec's
Answer:	First of all What is Intense curl cream?

Product description

Introducing the all-new GENPRO10X3, our most rugged, compact, and powerful, onboard marine battery charger we have ever made. The GENPRO10X3 is designed to charge and maintain up to three 12-volt lead-acid and lithium-ion batteries, including flooded, gel, AGM, and deep-cycle batteries. Each 12-volt battery bank provides up to 10-amps of pure charging power, plus doubles as a battery maintainer and battery desulfator. Included is a GENPRO10X3 30-Amp 3-Bank Waterproof Onboard Marine Battery Chargers (120-240VAC), Self-Tapping Mounting Screws, User Guide, 3-Year Warranty and certified to UL1236, ISO 8846, and 33 CFR 183.410.



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• Multiple banks - A three-bank onboard battery charger rated a 30-amps - 10-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
• Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Redefined mounting - A simplified mounting system allows for quick and easy installations in any direction - even up-side-down - with an integrated anti-vibration backing to isolate shock, vibration, and noise.
• Designed for water - A fully-sealed and waterproof onboard battery charger with an ingress protection rating of IP68, but has survived brutal life cycle testing, including thousands of hours underwater.
• What's in the box - GENPRO10X3 30-amp 3-bank waterproof onboard marine battery chargers (120-240VAC) with a 72-Inch (182cm) DC cables with 3/8-inch (M10) eyelets and a 72-inch (182cm) Type-B AC cable, self-tapping mounting screws, user guide, and 3-year warranty.

User questions & answers

Question:	Is this compatible with outboard charging alternator
Answer:	Yes.
Question:	Will this work on a semi truck
Answer:	Yes.
Question:	Can I charge two different size batteries at the same time. Two 27 series and a 24 series
Answer:	Yes I currently have two 29s and a 27 hooked up to the 3 bank charger. It is a really smart charger. I currently have two of the NOCO chargers and they have given me excellent service.

Product description

Introducing the all-new GENIUS5, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS5 is a 6-volt and 12-volt battery charger, battery maintainer, trickle charger, and battery desulfator, rated at 5-amp for all types of lead-acid and lithium-ion batteries, including flooded, gel, and AGM, as well as, marine and deep-cycle batteries. 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• Meet the GENIUS5 - Similar to our G3500, just better. It's 34% smaller and delivers 65% more power. It's the all-in-one solution - battery charger, battery maintainer, trickle charger, plus battery desulfator.
• Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
• Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge.
• Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more.

Product description

The GENM2 On-Board Battery Charger offers the perfect mix of high-technology and rugged construction. With a fully-sealed, waterproof housing, the GENM2 can be easily installed and mounted directly onto a variety of applications and specifically designed for tough marine environments. Its waterproof design is capable of withstanding submersion down to 3-meters for extended periods of time without failure, and rated IP68 and NEMA 6P, providing continuous operation in the most extreme environments. The GEN Series On-Board Battery Chargers have some of the most advanced charging technology in its class. Utilizing the latest topology and power design, it is one of the most compact and lightweight battery chargers. Its onboard processor is capable of detecting, diagnosing, recovering, charging and maintaining all types of lead-acid batteries. Safely charge Wet Cell (Flooded), Gel Cell, AGM and Deep-Cycle batteries with zero overcharge. Plus, it protects against reverse polarity, sparks, short circuits, open circuits, and thermal runaway. And the GEN Series On-Board Battery Chargers are completely automatic. It continuously monitors the battery - while detecting any potential battery problems - shutting off power when the battery is fully charged, but observing the battery for optimal battery maintenance. Not only does the GEN Series On-Board Battery Charger have advanced safety features, but it also been tested and certified by multiple third-party laboratories, including Underwriters Laboratories UL1236, ISO 8846 Marine Standards, and Ignition Protection US Coast guard 33 CFR 183. 410. And all of this is backed by our 5-Year Limited . Other commonly used search terms: 12v battery charger, boat accessories marine, marine accessories for boats, 3 bank marine battery charger, on board battery charger, 4 bank marine battery charger, deep cycle battery charger, rv battery charger, waterproof battery charger, waterproof boat battery charger, waterproof marine battery charger, noco boat battery charger, noco gen battery charger, on-board battery charger, battery charger for boat, noco onboard charger.

• An 8 amp (4 amp per bank) on-board battery charger for charging and maintaining two 12-volt batteries independently.
• Safely charge all types of lead-Acid batteries from 20-120ah, including wet, gel, AGM, and deep-cycle batteries.
• Advanced safety protection featuring spark-proof technology, plus reverse polarity, thermal, ignition, and overcharge protection.
• Rugged and waterproof construction capable of submersion down to 3-meters and rated ip68 and NEMA 6p.
• One of the most advanced battery chargers in its class, which is certified to ul1236, ISO 8846, 33 CFR 183. 410, plus backed by a 5-year.
• Built-in battery desulfator to recover worn-out batteries.
• Saltwater-tested to combat corrosion.

User questions & answers

Question:	I have the gen 4 when the lights show green it's still showing 14.56 volts is that normal
Answer:	Yes
Question:	Can I juse the NOCO GENIUS GENM2 charger with a Honda EU2000i Portable Inverter Generator
Answer:	Yes. That generator has a 120v outlet just like a house. I think the outlet is good for 20amps. Only thing would be you would need to run it long enough to power the charger so it could charge the battery it's hooked to which could take a while to properly charge.
Question:	Will this charge 6volt deep cycle golfcart batteries
Answer:	No Sir-This is only for 12 volt batteries-The model you want is the. Genius G3500 it will charge 6/12 volt batteries @ 3.5amp for around 50 bucks it will bring that battery back to life.
Question:	How dose it mount to the hull/boat...i dont see tabs for mounting screws
Answer:	On the corners are holes - drill those out and then use 6" lag bolts (as mentioned in another answer), or drill some holes in the hull and run zip ties. Larger holes make running zip ties easier. Note: while adding the holes in the hull will cause leaks, this unit is waterproof to 3 meters so it will work as your boat is taking on water. But it will be mounted well.

Product features

IP68 Waterproof

100% completely sealed, protects against extreme working environments & rated at IP68.

Safe

Protects against reverse polarity, sparks, overcharging, overcurrent, open-circuits, short-circuits and overheating.

Firewall

Multi-level safety barrier prevents unsafe and abnormal conditions.

Optimization

Stabilizes internal battery chemistry for increased performance and longevity.

Fast

Charges two times faster than traditional battery chargers.

Recovery

Applies a high-voltage pulse charge when low-voltage, sulfation or lost capacity is detected.

Interactive

Alters the charging process based on organic battery feedback.

Ignition Protected

Non-igniting and temperature controlled for safe and worry-free operation.

Product description

Introducing the all-new GENIUS1, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS1 is a 6-volt and 12-volt battery charger, battery maintainer, trickle charger, and battery desulfator, rated at 1-amp for all types of lead-acid and lithium-ion batteries, including flooded, gel, and AGM, as well as, marine and deep-cycle batteries.



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• Meet the GENIUS1 - Similar to our G750, just better. It's 35% smaller and delivers 35% more power. It's the all-in-one solution - battery charger, battery maintainer, trickle charger, plus battery desulfator.
• Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
• Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
• Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge.
• Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more.

Product description

Guest on-board battery chargers have been redesigned from the inside out with the customer in mind. Our newest generation on-board marine battery chargers include leading advancements in digital charging technology and waterproof design/construction. Every Guest charger has a dedicated charging, Sensing and control per bank. The easy to read graphics indicates the status of each battery bank through the charging process.

• 12v 8 amp 2 bank on-board battery charger
• built-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. in-line fuses for maximum dc wire protection.
• 100% waterproof (ip67) and shock resistant for all fresh and saltwater applications
• dedicated battery charging, sensing and control per bank
• for all 12 volt flooded and agm lead acid batteries. 2 year warranty
• Fit type: Universal Fit

User questions & answers

Question:	How long are the charging wires? The charging unit will be mounted 8 feet from each battery, will they reach
Answer:	They will not reach. I estimate that the leads from the charger are 3-4 feet.
Question:	why does this take so long to ship
Answer:	Can't answer that fully, probably supply and demand. If they are not in stock , can't ship until they have stock????
Question:	Can you extend the cable that connect to the batteries since I need 8 foot
Answer:	I would try to mount unit in different spot 1st. Sure u can extend any wire, guessing warranty would b voided then...
Question:	How long are the charging cables ? I saw one answer 3 to 4 feet. A more accurate measurement would be a big help
Answer:	I didn't measure them, but I think they are more like 6 feet.

Product features

Intuitive LED Display

Easy to read LED user display indicates the status of each battery bank through the charging process.

Fully Automatic Multi-Stage Performance Charging

ChargePro’s 5-Stage Performance Charging algorithm is fully automatic and designed to maximize battery performance and extend battery life of all 12 volt Flooded and AGM lead acid batteries.

100% Waterproof & Shock Resistant

100% waterproof (IP67) and shock resistant for all fresh and saltwater applications.

Heavy-duty Strain Reliefs

Durable construction prevents cable strain and breakage.

In-line Safety Fuses

Provides maximum DC wire protection with reverse polarity, over-current, over-voltage, over-temperature and ignition protection.

Low Profile & Lightweight

Low profile sealed aluminum housing is potting free contributing to a 40% lighter design, allowing more efficient heat dissipation, increasing longevity.

• [CHARGE DEAD BATTERIES] The car battery charger built with strong pulse repair technology to reverse the damaging effects when batteries are left uncharged for extended periods to improve battery performance and longevity.
• [WIDE APPLICATION] Charge fully drained 12V Pb/SLA/GEL/AGM/VRLA/sealed lead-acid batteries and WET/FLOODED, the Automatic battery Charger is a great choice for Car, Motorcycle, ATV, RV, UTV, Powersport, Boat, Ride-on Toy, Golf Cart, Lawn Mower and more devices. NOTE: Only work with 12-volt battery, not compatible with 24-volt and 6-volt battery.
• [LCD SCREEN] Using a backlit LCD display, clearly and visibly shows charging voltage, current, battery type, charging mode, and the percentage of power remaining. Allow quick and easy to use the trickle charger in the dark or at night.
• [BEYOND MAINTENANCE] It's a trickle charger and also an advanced battery maintainer, a fully-automatic, worry-free car battery charger for daily use.
• [SAFETY GUARANTEE] Multi protection against Reverse Polarity, Short Circuit, Over Voltage/Current, over Charge/Discharge, overload, overheat; Spark proof during lead connection, the automatic battery trickle charger is full-loaded and burn-in test proves its stable performance and high reliability.

User questions & answers

Question:	Does the fan run continuously, or only as needed
Answer:	If it ran off a usb connection maybe but I wouldn’t risk it even it it could.
Question:	The fan does not come on when I plug it in. Is this normal
Answer:	Out of the box it was 3/4's charged. It went to full charge in less than an hour.
Question:	What is the input amps the charger uses? - not output
Answer:	I left mine in a boat in the hot and cold for at least 3 months and it still had 75% charge. It hadn't been used for a long time before it was placed there. Recommend charging it at least once a month just to be safe.
Question:	Can it be used with an extension cord
Answer:	If it is USB C, Yes.

Product features

12V 5A Automotive Battery Charger/Maintainer, bring batteries back to life.

The 12V 5A Battery Charger allows you to connect the charger to the battery and leave it for maintenance indefinitely. When the battery is fully charged, it will automatically minimizes the current and turn itself to a battery maintainer.

Specification:

Input Voltage: 100-240V 50-60Hz

Output Voltage: 12V

Output Current: 5A

Material: ABS + PC housing

Temperature: -10~45°C (14~113°F)

Weight: 465g/1.03lbs

Dimensions: 6 x 3.4 x 2.4in

Cable Length: 130cm/51in

Remark: for 4Ah-15Ah battery, we suggest use “Repair” mode, because the battery size is too small, use pulse charge is very good for small size battery.

Package:

1 x Car Battery Charger

1 x User Manual

Automatic Stop after Full Charged

Stops charging automatically when battery is fully charged or topped off, switching to float mode monitoring.

Good Cooling System

16-layer fin cooling aluminum sheets and fans are used for cooling, which makes the cooling performance more powerful!

Smart protection

The battery charger offers safety features including reverse-polarity protection, over-current protection, overload protection, over-voltage protection, over-charge protection, and over-temperature protection.

ABS Flame-retardant Shell

Made of ABS flame-retardant material, insulated, flame retardant and high temperature resistance, ensure charging safety.

Pure Copper Alligator Clips

Ensured a constant output and non-heating for long time charging.

Small Size

Convenient store and carry.

Product description

Introducing the all-new GENIUS10, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS10 is a 6-volt and 12-volt battery charger, battery maintainer, trickle charger, and battery desulfator, rated at 10-amp for all types of lead-acid and lithium-ion batteries, including flooded, gel, and AGM, as well as, marine and deep-cycle batteries.



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• GENIUS10 - Similar to our G7200, just better. It's 17% smaller and delivers 115% more power. It's the all in one solution battery charger, a battery maintainer, trickle charger, plus battery desulfator
• Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries
• Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates
• Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts
• Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life
• Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 24/7 - with zero overcharge
• Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more