The Battery Tender 4-Bank 12V 1.25A charger (part 022-0148-DL-WH) combines four independent 12-volt charging stations in one housing. The manufacturer describes it as charging and maintaining up to four 12V batteries at once, with each bank delivering 1.25 amps for 5 amps combined. For a garage or shop that keeps several 12V batteries charged, one mounted unit replaces four single-bank chargers that would otherwise compete for outlets and bench space. Each bank uses the manufacturer's 4-stage ISM charging and drops into float maintenance once its battery is full, so a battery parked for winter holds storage voltage instead of being overcharged. That is the practical gap between this unit and a basic trickle charger.
This is a general-purpose multi-bank maintainer rather than a vehicle-specific part, so fitment depends on the batteries you connect, not the vehicle. The manufacturer lists a compact 8.8" x 7" x 3.5" footprint and about 5 lbs for the charger alone, small enough for a shelf or wall bracket. Searches for a 12V multi-bank battery maintainer, a 1.25 amp per bank float charger, a wall-mount garage battery charger, or an AGM battery maintainer for multiple vehicles all point to this use case. Owners who run performance cars, track cars, or weekend toys can keep each battery topped off without buying separate chargers.
The manufacturer states that once a battery reaches full charge, its bank switches to float maintenance without risk of overcharge, which makes it suitable for long storage periods.
According to the manufacturer, the box includes four sets of two-in-one alligator clip and ring terminal cables, along with the instruction manual, so separate battery leads are not needed for a standard setup.
The manufacturer notes that the included wall-mount bracket allows a permanent installation, with cables routed to each vehicle bay. Only the battery ends need to be connected or disconnected during use.
Basic use requires no hardwiring. For a semi-permanent setup, the manufacturer's guidance is to identify each battery's positive and negative posts, attach the red ring terminal to positive and the black to negative, tighten the bolts with 8mm and 10mm wrenches, and then plug the SAE end of each cable into its bank. Dielectric grease on the terminals helps resist corrosion. Alligator clips work for one-time or emergency charging. Mount the unit on a wall using the bracket so cables reach each bay without strain. Difficulty is easy, and the main gotcha is confirming polarity on every bank before tightening the terminals.
