The Battery Tender 5-Bank 6V/12V, 4 Amp Selectable charger is a shop-style unit that keeps five separate batteries charged and maintained from one wall outlet. Each bank has its own chemistry selector (lead-acid or Lithium) and its own voltage selector (6V or 12V). That per-bank control lets a single bench service a lithium motorcycle pack, an AGM car battery, and a flooded classic-car battery at the same time. At 4 Amp per bank, the manufacturer says the 5-Bank charges and recovers batteries more than three times faster than a 1.25 Amp Plus during bulk charging. Spark-proof output and reverse-hookup protection, which the manufacturer lists as standard, make it safer to use than a bargain multi-port charger with no such protection.
Buying one five-bank unit makes more sense than running five single chargers, which means five power cords, five sets of leads, and five warranties to track. The manufacturer's listing includes a 3 year general limited warranty. Owners on user forums report using Battery Tender chargers on stored vehicles for many years, which supports the long-term maintenance use this unit is built for. This is not a vehicle-specific part, so it suits a home garage, a dealership, or a collector shop that services mixed 6V and 12V batteries. Searchers looking for a multi-bank 6V 12V lithium and AGM maintainer, or a 5 bank 4 amp shop charger, will find this is the match.
The manufacturer states that each bank can be set to lithium or lead-acid. An older manual for a comparable selectable model lists lithium charging as 12V only, so details vary. Confirm the 6V lithium setting with the manufacturer before connecting a 6V lithium battery.
According to the manufacturer's manuals for comparable selectable Battery Tender models, voltage and battery type must be chosen after AC power is applied and before the charger is connected to the battery. Once the battery is connected, those selections cannot be changed.
No. The manufacturer positions it for maintaining multiple vehicles, so fitment depends on the battery voltage and chemistry rather than the make or model of the vehicle.
No hardwiring is needed. You plug the charger into an AC outlet, set each bank's voltage and chemistry, then clip each bank to its battery. The manufacturer's selectable-charger manuals say to connect the red clip to the positive post first, then attach the black clip to the negative post or a chassis ground located away from the battery, and to avoid facing the battery during that final connection. Place the charger away from the batteries, because battery gases will corrode and damage the charger if it sits directly above a battery. When working on a battery whose posts are different sizes, the positive post usually has a larger diameter than the negative post, which helps confirm polarity before you clip on. No special tools are required beyond the included leads. Set the voltage and chemistry before connecting, since the selections lock once the battery is attached.
