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Best Overall: CTEK 56-353 at Amazon
"Powerful and feature-rich, the CTEK 56-353 is undoubtedly the best deep cycle battery charger out there."
Runner-Up, Best Overall: Ampeak Smart Battery Charger at Amazon
"Ampeak’s Smart Battery Charger boasts a laundry list of innovative features that give it an edge over the competition."
Best 6V: Schumacher SC1280 at Amazon
"If you’re on the hunt for a well-rounded 6V deep cycle charger, look no further than Schumacher’s SC1280."
Best 12V: BMK EPA1205 at Amazon
"There is no shortage of 12V deep cycle battery chargers in the market, our favorite 12V charger has to be the BMK EPA1205."
Best Value: Clore Automotive Pro-Logix PL2310 at Amazon
"The deep cycle battery charger uses a proprietary multi-phase cycle to optimally charge and maintain batteries."
Best Solar-Powered: Suner Power BC-8W at Amazon
"Simple yet functional, Suner Power’s BC-8W is a solar-powered battery charger that can be used just about anywhere."
Best Compact: AIMTOM IBC-4000 at Amazon
"Featuring an integrated microcontroller unit, the charger uses a smart 8-stage system to optimally charge and maintain batteries."
Best With Desulfation Capabilities: BatteryMinder 128CEC1 at Amazon
"Featuring a microprocessor-controlled 7-step charging system, automatic detection of bad cells, and the ability to charge at multiple rates."
Best On-Board: ProMariner Pro Sport 8 at Amazon
"It’s completely waterproof and shockproof, and comes pre-wired for easy installation."
Courtesy of Amazon
A bit pricey
Powerful and feature-rich, the CTEK 56-353 is undoubtedly the best deep cycle battery charger out there. Even being endorsed by popular talk show host Jay Leno, so you don’t just have to take our word for it. Its unique 8-step charging system uses a patented program to automatically charge and recondition batteries, ensuring maximum battery life and performance. The charger also features a variety of built-in safeguards against reverse polarity connections, short circuits, and sparks. CTEK 56-353 is ideal for charging all types of 12V lead-acid batteries (e.g. Wet, Gel, and AGM), and uses pulse maintenance to keep the batteries in perfect health when they’re not in use. The charger comes with two pairs of interchangeable connection leads, one with clamps and one with eyelet terminals. It’s backed by a 5-year limited warranty.
Works in cold weather conditions
Compatible with most car batteries
Ampeak’s Smart Battery Charger boasts a laundry list of innovative features that give it an edge over the competition. This charger’s intelligent microprocessor constantly monitors a battery’s voltage level to optimize the 6-step charging cycle, resulting in quicker charge times and enhanced battery performance. It comes with an advanced LCD screen that allows you to easily monitor important information, such as battery type, charging status, and more.
The Ampeak Smart Battery Charger is suitable for all types of 12V lead-acid batteries (e.g. Standard, AGM, and Gel), and uses high-voltage reconditioning (up to 15.8V) to restore old batteries. It can even work in cold weather conditions, thanks to the specialized “Winter Charging” mode. Made from durable ABS plastic, the deep cycle battery charger features a fan-based cooling system for better heat dissipation and enhanced charging efficiency.
Versatile charging hookups
Auto output control
Lower than average warranty
If you’re on the hunt for a well-rounded 6V deep cycle charger, look no further than Schumacher’s SC1280. Having both rapid charging (15A) and maintenance (3A) functions, it’s suited for all types of batteries (e.g. Standard, AGM, and Gel). The SC1280 features microprocessor control and comes with handy perks like auto voltage detection. It also includes reverse hook-up protection, which ensures that the unit will not operate if clamps are not connected properly. Simple push-button controls and LED indicators make using the charger a walk in the park, and a digital display lets you keep tabs on crucial parameters such as charge percentage and voltage. Fully automatic, the Schumacher SC1280 can automatically select the appropriate output for charging and maintaining batteries. To top it all off, this UL-certified charger is backed by a 2-year warranty.
Safeguards against voltage spikes
Defective units have been reported
There is no shortage of 12V deep cycle battery chargers in the market, our favorite 12V charger has to be the BMK EPA1205. It features a 4-stage (diagnosis, bulk charging, absorption, and maintenance) smart charging system, managed by a built-in microcontroller unit. The fully-automatic charger is also secured against voltage and current spikes, short circuits, reverse polarity connections, temperature surges, and more.
The BMK EPA1205 includes a bunch of multi-status LED indicators that not only make it easy to know the battery charge level but also glow in different ways to communicate additional information about your battery. The charger works great with all types of deep-cycle lead-acid batteries (e.g. SLA, VRLA, AGM, and Gel), ranging from 15Ah to 100Ah. It’s IP65 waterproof and comes with two pairs of connection leads, one with ring terminals and one with fully-insulated alligator clips.
Variable charging rates
"Soft Start" mode
Reports of DOA units
Offering tons of practical features at an affordable price, Clore Automotive’s Pro-Logix PL2310 is undeniably our top pick in terms of value. The deep cycle battery charger uses a proprietary multi-phase cycle to optimally charge and maintain batteries. It works with both 6V and 12V batteries, and supports three different charging rates (2A, 6A, and 10A).
Using the Pro-Logix PL2310 is a cakewalk, as the unit comes with intuitive button controls, indicator lights, as well as a digital display that provides a variety of useful information. The fully-automatic charger features built-in safeguards against battery faults, short circuits, reverse polarity connections, and things like that. It can be used to charge all types of batteries (e.g. Flooded, AGM, and Spiral Wound), and even includes a special “Soft Start” mode for restoring severely-depleted batteries to a healthy state.
Can charge virtually anywhere
No AC Backup for charging
No safeguard features
Simple but effective, Suner Power’s BC-8W is a solar-powered battery charger that can be used just about anywhere. It converts solar energy into a 12V DC charge, which can be used to charge and maintain batteries. The charger comes with high-efficiency solar cells and features a premium tempered solar glass ensuring protection from dust and other external factors. It’s ideal for charging and maintaining all types of deep cycle batteries (e.g. SLA, AGM, Wet, and Gel), and requires little to no maintenance. Other notable features of Suner Power BC-8W include a cigarette lighter socket for plug-and-play usage, and a built-in blocking diode that prevents reverse discharging.
Compact and lightweight
Feels a bit flimsy
Measuring 5.5 x 3.1 x 1.6 inches and weighing just 1.3 pounds, AIMTOM’s IBC-4000 is compact enough to be carried around anywhere. Featuring an integrated microcontroller unit, the charger uses a smart 8-stage system to optimally charge and maintain batteries. It automatically selects the appropriate voltage (6V or 12V) and is ideal for all types of deep cycle batteries (e.g. SLA, VRLA, Wet, Gel, and AGM). The AIMTOM IBC-4000 comes with a backlit LCD panel that shows a wide range of useful information in real-time, such as charging mode, battery type, and more. It even has a convenient “Auto Memory” function, which restores the last-selected charging mode and settings if the unit is restarted. The IBC-4000 is also secured against voltage and current surges, temperature spikes, and reverse polarity connections. It comes with two pairs of connection leads, one with clamps and one with eyelet terminals.
Variable charge rates
Sulfation (build-up of lead sulfate crystals) is arguably the biggest cause that leads to early failure in lead-acid batteries. However, with the BatteryMinder 128CEC1, you don’t have to worry about it. Having full-time desulfation capabilities, the charger utilizes a patented range of high-frequency pulses to recondition weak batteries and restore them to their original potential. It can maintain up to 8 batteries at a time (using a separate connector) and works with all types of batteries including VRLA, SLA, Starter, Wet, and Hybrid.
The 128CEC1 uses an ambient temperature sensor to automatically adjust the batteries’ charging rate, maximizing performance and longevity. It also comes with built-in safeguards against sparks, reverse polarity connections, short circuits, and much more. Other noteworthy features include a microprocessor-controlled 7-step charging system, automatic detection of batteries with bad cells, and the ability to charge at multiple rates.
Auto recondition setting
Looking for a feature-packed on-board battery charger for your boat? You’re going to love ProMariner’s Pro Sport 8. Featuring digital multi-stage performance charging technology, it makes quick work of keeping marine batteries charged and maintained at all times. The charger comes with an advanced “Energy Saver” mode that monitors and maintains batteries only when needed, resulting in lower operating costs and increased reserve power performance.
There’s also “Storage Recondition” mode, which automatically conditions batteries once a month to maximize their life. ProMariner Pro Sport 8 also comes with “Distributed-On-Demand” technology, which charges/maintains the engine’s crank battery while distributing the remaining power to trolling motor/house batteries. Having a rugged construction, the deep cycle battery charger is secured against voltage spikes, temperature surges, reverse polarity connections, and things like that. It’s completely waterproof, shockproof, and comes pre-wired for easy installation.