11 best marine battery trickle chargers

Marine battery trickle chargers are specialized battery chargers designed to maintain and prolong the life of batteries commonly used in marine applications, such as boats, yachts, and other watercraft. These chargers are a vital tool for boat owners to ensure that their batteries remain charged and in good condition, particularly during periods of inactivity or storage. Here's what you should know about marine battery trickle chargers:

Purpose: The primary purpose of a marine battery trickle charger is to provide a slow and continuous charge to a marine battery over an extended period.This helps prevent the battery from discharging completely and maintains it at an optimal charge level.
Trickle Charging: Trickle charging is a low-current charging method that delivers a small, constant flow of electricity to the battery. It is designed to offset the self-discharge rate of the battery and keep it fully charged without overcharging or damaging it.
Battery Types: Marine batteries come in different types, such as lead-acid batteries, AGM (Absorbent Glass Mat) batteries, and gel batteries. Trickle chargers are typically compatible with various battery types, but it's essential to choose a charger that matches your battery type and voltage.
Automatic vs. Manual Chargers: Some marine battery trickle chargers are equipped with automatic features that monitor the battery's voltage and adjust the charging rate accordingly. Manual chargers require the user to set the charging rate manually.
Safety: Marine battery trickle chargers are designed with safety features to prevent overcharging, overheating, and reverse polarity connections. Safety is crucial to avoid damage to the battery and potential hazards.
Voltage and Capacity: Trickle chargers are available in different voltage and capacity ratings to accommodate a range of battery sizes and configurations. It's essential to choose a charger that matches the specifications of your marine battery.
Usage Scenarios: Marine battery trickle chargers are commonly used in several scenarios:
- Off-Season Storage: When boats are stored for extended periods, trickle chargers help keep the batteries in good condition.
- Maintenance Charging: They can be used for ongoing maintenance to ensure batteries are ready for use when needed.
- Emergency Backup: Trickle chargers can also serve as a backup power source in case of a dead battery.
Installation and Connection: Proper installation and connection are crucial for effective charging. Trickle chargers typically come with cables and connectors that need to be attached securely to the battery terminals.
Longevity: Using a marine battery trickle charger can significantly extend the lifespan of marine batteries by preventing sulfation and other forms of battery degradation.

Overall, marine battery trickle chargers are essential tools for boat owners to maintain the reliability of their onboard electrical systems and ensure their batteries are ready to perform when needed, whether for starting the engine, powering lights, or running various onboard equipment.

Below you can find our editor's choice of the best marine battery trickle chargers on the market

NOCO GENIUS1, 1-Amp Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

NOCO

Based on 11 reviews Check latest price

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.

ProMariner 43012 ProSport 12 12 Amp, 12/24 Volt, 2 Bank Generation 3 Battery Charger

ProMariner

Based on 1 reviews Check latest price

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?

NOCO GENIUS2, 2-Amp Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

NOCO

Based on 3 reviews Check latest price

Product description

Introducing the all-new GENIUS2, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS2 is a 6-volt and 12-volt battery charger, battery maintainer, trickle charger, and battery desulfator, rated at 2-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 GENIUS2 - Similar to our G1100, 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.

NOCO GENIUS5, 5-Amp Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

NOCO

Based on 4 reviews Check latest price

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.

NOCO GENIUS10, 10-Amp Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

NOCO

Based on 4 reviews Check latest price

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

NOCO GENIUS2X2, 2-Bank, 4-Amp (2-Amp Per Bank) Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator with Temperature Compensation

Based on 446 reviews Check latest price

Product description

Introducing the all-new GENIUS2X2, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS2X2 is a 6-volt and 12-volt two-bank battery charger, battery maintainer, trickle charger, and battery desulfator. It is rated at 4-amps (2-amps per bank) all types of lead-acid and lithium-ion batteries, including flooded, gel, and AGM, as well as marine and deep-cycle batteries.Other commonly used search terms: battery charger, car battery charger, battery charger automotive, battery maintainer, 12v battery charger, 12 volt battery charger, 6v battery charger, 6 volt battery charger, auto battery charger, agm battery charger, deep cycle battery charger, bike battery charger, motorcycle battery charger, car battery maintainer, automotive battery charger, motorcycle charger for battery, battery charger for cars, automatic battery charger, trickel battery charger automotive, trickle charger, trickle charger for car, trickle charger for car battery, trickle charger for 12 volt batteries, trickle charger for motorcycle battery, trickle charger 12v, trickle charger 6v, trickle charger for motorcycle, trickle charger for automobiles, trickle charger for lawn mower, battery maintainer 12 volt, battery 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Meet the all-new GENIUS2X2 - a two-bank battery charger, battery maintainer, trickle charger, and battery desulfator - the perfect all-in-one solution for battery maintenance.
Multiple banks - A two-bank battery charger maintainer rated a 4-amps - 2-amps per bank - designed to charge and maintain multiple vehicles like cars, motorcycles, boats, ATVs, RVs, lawn mowers, lawn tractors, trucks, and more.
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.

ADPOW 5A 12V Automatic Smart Battery Charger Automotive Maintainer 7-Stages Trickle Charger for Deep Cycle Battery Car Marine Trolling Motor Boat Truck Lawn Mower RV AGM with Terminal Cleaning Brush

Based on 680 reviews Check latest price

Intelligent Charging Mode: 7-stages automatic charging process [ Desulfation - SoftStart - BulkCharge - Absorbtion - TestMode - Recondition - Float] by MCU controller, the LED indicator provide visual feedback of battery capacity and diagnostic information accordingly, efficiently prolong the lifetime of the battery.
Wide Application: Charge fully drained 12V Pb/SLA/GEL/AGM/VRLA/sealed lead-acid batteries and WET/FLOODED for maintenance, including lawn mower, boat, car, electric vehicle, electric tools, ride-on toys.
Multi-Protection: Ensure ultimate safety protect against Short circuit/OVP/OCP/Overload/Polarity reversed,etc, full-loaded & burn-in test proved to be high efficiency and longevity.
Customized Design: Ultra-compact, portable and lightweight with the mounting holes, non-slipping and easy to carry; Water and dust resistant make it more safe to use in any situations.
What you Get: Come with smart battery charger with DC Adapters, with lifetime quality warranty & 30 days refund & timely after-sale service solve all your problems.

User questions & answers

Question:	Will it restart correctly if the power to it goes out and comes back on
Answer:	About 1 ft long.
Question:	I attached it to my battery of my rv and the led lights just cycle through continuously, why would this happen
Answer:	Yes
Question:	I have a small drain on my battery in 2018 jeep can I leave this charger hooked up to keep it charged for days
Answer:	No, its not made to charge up a dead battery,it is a battery jump starter, not a car battery charger.
Question:	Battery has been in abosorption mode for 3 days. Is something wrong
Answer:	Hello Armando, We appreciate that you are interested in our products. This starter has 12-month warranty. Any other questions or need help, you can contact us with Amazon or our offical E-mail address [email protected] with our best assistance. Thank you.

NOCO GENIUS2X4, 4-Bank, 8-Amp (2-Amp Per Bank) Fully-Automatic Smart Charger, 6V And 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

Based on 280 reviews Check latest price

Product description

Introducing the all-new GENIUS2X4, making it one of our most powerful, highest-performing, energy-efficient, and compact charger yet. The GENIUS2X4 is a 6-volt and 12-volt two-bank battery charger, battery maintainer, trickle charger, and battery desulfator. It is rated at 8-amps (2-amps per bank) 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 all-new GENIUS2X4 - Similar to our G4, just better. It's 40% smaller and delivers 140% more power. It's the all-in-one 4-bank solution - battery charger, battery maintainer, trickle charger, plus battery desulfator.
Multiple banks - A four-bank battery charger maintainer rated a 8-amps - 2-amps per bank - designed to charge and maintain multiple vehicles like cars, motorcycles, boats, ATVs, RVs, lawn mowers, lawn tractors, trucks, and more.
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.

User questions & answers

Question:	I received 2 noco genius2x4 today 1st bank on one charger has quit , no lights or anythng is hapening there, what do i do
Answer:	We're sorry to hear you're having trouble with one of the banks on your GENIUS2X4. Please contact NOCO Support directly for warranty assistance.
Question:	Hello, will this charger works with bmw x5 2021 sdrive40i, honda accord 2014 exl, and toyota highland 2008 standard
Answer:	This is a battery charger so if the vehicles you mentioned have batteries in them then Yes. Works great on my Optima AGM Batteries.
Question:	Can each of the individual banks be set to perform differently, e.g.1 to force charge a dead battery, th 2nd to charge a 1vdc battery, 3rd to maintain
Answer:	As far as I can tell it does it automatically. I’ve had it hooked up to IV batteries it seems to charge some and keep maintaining the other ones
Question:	how come when i put 2x extention together it keep saying reverse polarity? but if i use one it fine
Answer:	We're sorry to hear you're having trouble. Try each extension individually to make sure they both work. If so, the extended D/C cable length with both extensions in place may be impairing the charger's ability to correctly sense the battery.

BMK 12V 5A Smart Battery Charger Portable Battery Maintainer with Detachable Alligator Rings Clips Fast Charging Trickle Charger for Car Boat Lawn Mower Marine Sealed Lead Acid Battery

Based on 2 reviews Check latest price

Product features

BMK 5A SMART BATTERY CHARGER IN HAND, ALL BATTERY TROUBLES GO AWAY.

STAGE 1 - DIAGNOSTIC

Desulfating the Battery Through 18V Pulse

The Charger can be used with 12-100Ah, however 12-60Ah is highly recommended for higher efficiency and battery protection.

STAGE 2 - BULK CHARGE

Charging Highest Rate Current Till 80% Capacity

Featured with LED for indicating different charging modes

Alter the charging process based on organic battery feedback.

STAGE 3 - ABSORPTION

Absorption, Till Full Capacity

Output voltage is limited to 14.7V while current declines as the battery to be fully charged.

Stabilize internal battery chemistry to increased performance and longevity.

STAGE 4 - MAINTAIN

Float, Maintain the Battery Through Pulse Charging

Battery is fully charged at this stage.

Minimize energy consumption when full power is not needed.

DEFECTIVE BATTERIES DETECT

The Fault Light Flashing: Reversed Polarity
The Fault Light ON: Defective Battery

SPARKPROOF

Prevent sparks
Automatically check whether the connection is correct or not before powering up

QUICK DISCONNECT HARNESS

Connect and disconnect with the battery in seconds

72-HOUR SAFETY FEATURE

Upgraded 72 Hour Safety Timer to commence anytime the charger is onto protect marginal batteries from over charging

NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Battery Charger, Battery Maintainer, Trickle Charger, And Battery Desulfator With Temperature Compensation

NOCO

Based on 1 reviews Check latest price

Product description

The GENIUS2D is a 2-amp direct-mount onboard battery charger and battery maintainer for 12-volt lead-acid batteries, including flooded, gel, and AGM, as well as automotive, marine, and deep-cycle batteries. An ultra-compact battery charger with a 24-inch AC cable and a 24-inch DC cable with 3/8-inch eyelet terminals designed to be securely mounted near your battery. It's designed for all types of 12-volt lead-acid batteries, including flooded, gel, AGM and other maintenance-free batteries. It features an all-new integrated thermal sensor that improves battery charging in both cold and hot environments, automatic battery sulfation detection and repair, and a low start detection voltage of 1-volt. Comes complete with a snap-fit mounting bracket with truss head screws and a 3-year. 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Meet the GENIUS2D - The all-new direct-mount onboard battery charger for an under-the-hood battery charging system and year-round battery maintenance.
Direct-Mount - Securely mounts nearby the battery with its rugged snap-fit mounting bracket and effortlessly installs into most materials with truss-head self-tapping screws.
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 - Charge batteries as low as 1-volt, including flooded, gel, and AGM, as well as automotive, marine, and deep-cycle batteries.
Beyond maintenance - It's not a trickle charger, it's an advanced battery maintainer. It monitors your battery 24/7, providing intuitive and safe maintenance charging with zero overcharge. A fully-automatic, worry-free battery charger for year-round use.
Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
Compatible with all types of vehicles - Add a permanent onboard battery charger to any vehicle to make battery maintenance simple and easy. Plus, combine with any of the GCP Series AC Port Plugs for remote charging access.

User questions & answers

Question:	If i use this on a car, will the alternator charge it or does it only get charged through the plug
Answer:	The GENIUS2D does not accept a charge. It is a power source. The GENIUS2D should be plugged into AC via the AC plug to recharge the battery.
Question:	Is this water proof
Answer:	The GENIUS2D is water resistant with a rating of IP65.
Question:	will this work for motorcycle batteries
Answer:	Yes; it works for my motorcycle, and the device is tiny enough to hide in a saddlebag.
Question:	does everything you need come with this item
Answer:	Yes.

Product features

SECURE BRACKET.

Use a drill to secure the mounting bracket using self-tapping screws (included).

ATTACH STRAP.

Loop the velcro mounting strap into the mounting bracket.

MOUNT GENIUS2D.

Clip the Genius 2D charger into the mounting bracket.

FASTEN STRAP.

Fasten the Genius 2D charger using the velcro mounting strap.

Automotive Battery Charger 12V/8A 24V/4A Trickle Charger Smart Automatic Battery Charger for Car Motorcycle Boat Marine Lawn Mower SLA ATV RV SUV Wet AGM Gel Cell Lead Acid Battery by YONHAN

Based on 545 reviews Check latest price

[COMPATIBILITY] Works with all types 12V and 24V lead-Acid batteries that within 6-150Ah(12V), 6-100Ah(24V), including AGM, GEL, SLA, Flooded (WET), or any common automotive, deep-cycle, marine, or maintenance-free battery. The automotive battery charger is compatible with all types of vehicles - charges and maintains cars, trucks, motorcycles, lawn mowers, tricycles, electric vehicles, agricultural vehicles, off-road vehicles, pickup trucks, boats, yachts, motorboats, and more - you name it.
[REPAIR MODE] Car battery charger automatic sulfating and acid stratification detection, the advanced repair mode can repair and reverse the damaging effects when batteries are left uncharged for extended periods to improve battery performance and longevity.
[AUTOMATIC CHARGING] Automatically detects 12 volt or 24 volt batteries, monitors the whole charging process automatically by microprocessor-controlled program, 24V 12V battery charger ensures an adaptive charge process with maximum safety, automatically stop when the battery is fully charged.
[SAFE CHARGING] Our battery charger/maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power.
[WHAT YOU GET] 24V / 12V battery charger & maintainer with battery clamps, user manual. Welcome to contact with us if you have any questions or requirement.

User questions & answers

Question:	What's the best way to use the repair mode for cars? e.g., use regular way first then switch to repair mode? or start with repair mode directly
Answer:	Start with repair mode directly.
Question:	Can you please post a link to user manual? Manual did not come in the package as listed. Thanks
Answer:	The manual is basically useless. It just says what the charger does vaguely it doesnt get into detail
Question:	Can this charger be connected to 2 or 3 batteries and keep them charged at the same time
Answer:	Yes it could charge three or four 12V batteries as long as you wire them in parallel. When you wire parallel the voltage stays the same. if you wire in series it doubles. Since this charger will do 24V as well, the other post about charging two 12v batteries in series is also correct and no issue. Keep in mind, the more batteries, the slow you will charge them. This is no different concept than we use with large solar power battery banks.
Question:	What is the recommended setting for a calcium n150mf? automotive or agm
Answer:	It does work great.

Product features

12V/8A 24V/4A Automotive Battery Charger/Maintainer, Power Your Device, Power Your Life

Repair Mode - Repairs and Reverses Battery Damage

This battery charger develops a high-frequency and low-frequency pulse technology with excellent repair function. Used to repair old, idle, damaged, stratified, or sulfated batteries.

Fully Automatic Charge & Maintain

Charges and maintains all types 12V and 24V lead-acid batteries, microprocessor controlled multi-stage charging for added precision, safety and battery life, keeps stored lead-acid batteries charged. Use CPU precise control with multiple protection full of self-stop, let you use at ease.

NOTE: This battery charger is not compatible with lithium-ion batteries.