The Battery Tender® Plus High Efficiency is a 1.25 Amp battery charger designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers. Included is a quick connect ring terminal harness for hard to reach areas and alligator clips for an alternate connection. This unit replaces the 021-0128 in the California market. Input: 100 - 240 VAC @ 50 / 60 Hz. Output: 12 volts DC @ 5.0 Amps. Automatically switches from full charge to float charging mode. Reverse polarity protection to ensure user safety; red and green lights alternately flash in this condition. Complete 4-step charging program (initialization, bulk charge, absorption mode, float mode). Safety timer: 72 hours. Five-year warranty. Listed in California appliance efficiency database. Agency approvals: UL / CSA / BC.