Battery Tender 10-Bank Multibank Charger, 40A Total (4A/Bank) — Selectable 12V/6V Smart Maintainer

The Battery Tender 10 Bank Multibank Charger is a compact smart charger that simultaneously charges and maintains up to ten 6V or 12V batteries at 4 amps per bank with automatic float protection.

Designed for workshops, garages, shops and fleet storage, this multibank unit consolidates ten independent charging channels into one lightweight housing. Each bank runs Battery Tender’s four-stage charging algorithm to bring batteries to a safe full charge and then hold them at a maintenance level to avoid overcharging during seasonal storage. The unit includes ten sets of alligator clips and a 6-foot AC cord for straightforward setup and comes with multiple safety layers for everyday use.

How many batteries can I charge at once, and what voltages are supported?

You can charge up to ten separate batteries simultaneously. Each bank delivers 4 amps and can be switched to work with either 12V or 6V battery systems to suit motorcycles, lawn equipment, ATVs and other small vehicles.

• Ten independent charging channels — one battery per bank
• Selectable 12V or 6V operation on each bank
• 4 amps output per bank (total 40 amps across all banks)

Will this charger work with different battery chemistries?

The charger supports common lead-acid types and selected lithium chemistry, using a complete multi-step charge cycle to condition batteries safely. It’s compatible with flooded, AGM, gel cell, and 12V LiFePO4 batteries when the correct voltage is selected.

• Works with flooded, AGM, gel cell lead-acid batteries
• Supports 12V LiFePO4 batteries (select 12V mode)
• Four-step charging process to reduce risk of under- or over-charging

What safety and convenience features are built in?

The multibank charger is engineered for safe, long-term unattended use and includes protections that minimize user error and electrical faults. A timed safety shutoff and reverse polarity protection reduce the risk of damage, while automatic float mode keeps batteries topped off without constant monitoring.

• Reverse polarity protection prevents incorrect hook-ups
• 25-hour safety timer automatically shuts off if charging stalls
• Spark-proof design and automatic transition to float/maintenance mode

What comes in the box and how easy is it to set up?

The package contains the multibank unit, ten separate alligator clip sets for easy attachment to battery posts, and a six-foot AC power cord. The lightweight, space-conscious design lets you mount or place the unit in tight workspaces and connect multiple batteries quickly.

• One 10-bank charger unit with built-in controls
• Ten alligator clip leads for individual battery connections
• 6-foot AC cord and a three-year limited warranty for peace of mind

Who is this for: The Battery Tender 10 Bank Multibank Charger is ideal for mechanics, small fleet managers, restoration hobbyists and anyone who stores multiple small batteries. If you need reliable, simultaneous charging for motorcycles, ATVs, lawn equipment, personal watercraft or backup batteries, and want automatic maintenance without constant supervision, this unit streamlines charging chores while protecting battery life.