G4  6V & 12V 4.4A 4-Bank Battery Charger and Maintainer

4.4 Amp 4-Bank Battery Charger and Maintainer

The G4 is a 4-bank automatic battery charger and maintainer for both 6V and 12V lead-acid and lithium-ion batteries. It's capable of charging up to four different batteries at the same time, and perfect for charging a Motorcycle, ATV, Snowmobile, Personal Watercraft, Lawn Mower and much more. It also can be used as a battery maintainer to keep a Car, Boat, RV, and deep-cycle batteries fully charged. And it monitors battery activity for safe and efficient charging without any overcharge and complete with a built-in battery desulfator to rejuvenate underperforming batteries.
  • A 6V and 12V 4-bank battery charger and maintainer.
  • Charges lead-acid and lithium-ion batteries up to 40 amp-hours.
  • Recovers deeply discharged batteries down to 2-volts.
  • Spark-proof technology and reverse polarity protection.
  • Built-in battery desulfator to recover worn-out batteries.
  • Safely monitors battery actively with zero overcharge.
  • Suitable for start-stop and CANbus vehicle systems.
  • Advanced diagnostics indication for damaged batteries.
  • Charge up to four different batteries at the same time.
  • WARNING: California’s Proposition 65
You save 20%
MSRP $249.95
In Stock
UPC: 0-46221-11091-3
5.80lbs | 10.31 × 10.24 × 4.80
4 Reviews

100% Of Reviewers Recommend This Product

Ultimate versatility.

Charge and maintain four different batteries at the same time.

If you have multiple vehicles or toys, the G4 is the perfect solution for keeping them fully charged and maintained. With four independent charging banks, you can safely charge multiple battery types— Wet Cell, AGM, and Lithium-Ion— from one seamless battery charger. Charge a 6V battery on one bank, and a 12V AGM battery on another. It's the ultimate versatile for anyone with multiple charging needs.

12V Lead Acid Battery Charger with Trickle Charging Mode

12V Norm Mode

Designed for charging starter and deep-cycle 12-volt lead-acid batteries, including Wet Cell, Gel Cell, Enhanced Flooded, Calcium, and Maintenance-Free.

12V AGM Deep Cycle Battery Charger with Trickle Charging Mode

12V Cold/AGM Mode

Designed for charging starter and deep-cycle 12-volt AGM batteries, or charging any 12-volt battery in cold temperatures below 50ºF (10ºC), including AGM.

6V Lead Acid Battery Charger with Trickle Charging Mode

6V Norm Mode

Designed for charging starter and deep-cycle 6-volt lead-acid batteries, including Wet Cell, Gel Cell, Enhanced Flooded, Calcium, and Maintenance-Free.

12V Lithium Battery Charger

12V Lithium Mode

Designed for charging lithium-ion batteries that include a battery maintenance system (BMS), including lithium iron phosphate batteries.


Safe to leave connected with zero overcharging.

Most manual, automatic or semi-automatic battery chargers continuously trickle charge batteries, making them susceptible to overcharge, which limits battery life. Our intelligent battery maintenance technology monitors battery activity and only begins charging when needed, and allows for continuous operation without user intervention and zero risks of overcharging your battery.

CANbus enabled.

Charge batteries directly from the 12-volt port.

CANbus electrical systems found on BMW, Ducati, Triumph and Harley-Davidson motorcycles disable the 12-volt charging port when the ignition is off. Recharging requires the ignition to be on, or connected directly to the battery. With CANbus enabled technology, it sends a unique voltage signal that automatically opens, and allows charging through the 12-volt accessory port.View The CANbus Dual 12V Plug Accessory


Battery maintenance made easy - times four

Plug-in, set and forget. It's no wonder it's the ultimate battery maintenance charger. Quickly connect and disconnect the battery charger when needed. It remembers the last charging mode and automatically resumes charging if accidentally disconnected or loses power, and it keeps any battery fully charged without supervision. With detachable D/C cables, use the charging leads you only need for a clean installation.

6V 12V 4-Bank Automatic Car Battery Trickle Charger Maintainer with Auto Memory Feature


Remembers the last charge mode when accidentally unplugged or loses power. You'll never come back to a dead battery again.

6V 12V 4-Bank Automatic Car Battery Trickle Charger Maintainer with Rugged Feature


Designed for a rugged working environment. It is water, shock, dirt and dust-proof, and rated at IP64.

6V 12V 4-Bank Automatic Car Battery Trickle Charger Maintainer with Firewall Feature


We don't design something that merely works, but remains safe after a major failure. So we built-in redundant levels of safety protection.

6V 12V 4-Bank Automatic Car Battery Trickle Charger Maintainer with 5 Year Limited Warranty

5 Year Warranty.

Our battery chargers are built to last. That's why we back it up with an unbeatable warranty and combine it with unparalleled customer service.

Advanced diagnostics.

Battery charging with intelligence.

Smart battery chargers can be frustrating. It won't simply begin charging if it detects a weak or damaged battery or force charging if it detects an unsafe or abnormal charging condition. But prevention is just one aspect. Understanding and finding a solution is just as critical. Welcome to Advanced Diagnostics, which analyzes battery feedback and display a particular error pattern if a problem is detected. Each flash pattern tells you what's wrong, and how to quickly fix it.
Single Flash: Battery will not hold a charge and should be checked by a professional.
Double Flash: Possible battery short, and should be verified by a professional.
Triple Flash: Battery voltage is too high for the selected charge mode. Double check the battery matches the charge mode.
Error LED Solid Red: Reverse polarity. Reverse the connections to the battery.
Standby LED Solid Orange: Battery voltage is too low for the battery charger to detect the battery.

Battery Charging vs. Battery Maintenance.

Which battery charger is right for you?

Selecting the proper battery charger depends on your needs. Do you need to recharge a dead battery entirely, or just keep a battery at full charge? Battery charging means you need to recharge a dead battery fully, whereas battery maintenance requires a mere trickle charge. Most battery chargers perform both functions, but understanding their limits and the amount of time to recharge depends on the size of the battery and vehicle. The G4 is designed for charging multiple smaller applications, like a motorcycle, ATV, snowmobile, or any lawn and garden equipment. But it's also a perfect battery maintainer for a car, boat, RV or even a truck. The charging time chart not only helps you determine how long it will take to recharge, but also its limits between battery charging and battery maintenance. Why maintain your batteries?

Efficient design.

Compact, yet powerful 4-bank battery charger.

A mix of electrical engineering and industrial design create a powerful battery charger into a tiny footprint. It uses high-frequency switch-mode technology to efficiency convert A/C power into safe D/C power for battery charging. And it's onboard microcomputer precisely controls the charging to minimize power loss to create an incredibly compact form factor.

More ways to charge.

The possibilities are endless.

Permanently mount eyelet connectors on multiple vehicles to make hard-to-access batteries easy to charge. Charge directly through the 12V auxiliary or OBDII port from inside a vehicle, or just extend the reach of your accessories. Whatever the case may be, our interchangeable X-Connect battery accessories create a reliable weatherproof connection that not only provides maximum current flow but fast and easy accessory changes.View All Battery Charger Accessories

Technical Specifications.

What's In The Box

  • G4 4-Bank Battery Charger and Maintainer
  • (2) GC001 Battery Clamps
  • (2) GC002 Eyelet Connectors
  • (4) GC004 10-Foot Extension Cables
  • User Guide & Warranty Information

Input Voltage AC

85-130 VAC, 50-60Hz

Battery Voltages

Charges 6-Volt and 12-Volt Lead-Acid and Lithium-Ion Batteries

Types of Batteries

Suitable for Wet Cell (Flooded), Gel Cell, Calcium, Lithium, AGM, Enhanced Flooded Battery or any Maintenance-Free Battery

Battery Capacity Range

Ideal for Batteries up to 40 Amp-Hours. Suitable for Maintaining All Battery Sizes.

Charging Amperage

4.4 Amps (1.1 Amps Per Bank)

Power Consumption

84 Watts (Max)

IP Protection


DC Cord

60-Inches (16AWG)

AC Cord

60-Inches (18AWG)