Battery Tender Portable Power Tender Plus 12V 5 Amp Charger... a take - anywhere charger. ... Designed for portable operation, this top-quality Charger fits the bill on almost any battery you toss its way. Charges and maintains both flooded and sealed, maintenance free, AGM, lead acid batteries. Best of all, the float / maintenance function maintains batteries at the proper storage voltage without the damaging effects caused by trickle chargers. Has a built-in compartment for accessory cable storage. Details: Universal AC output: Voltage is 100-240 VAC @ 50/60 Hz. Output : 12 volts DC @5 amps or 2 1/2 amps Maximum output current is automatically selected based on the cable accessory output connector configuration (patent pending). Only accessories with 3-pin connectors ship with the unit. If your accessories only have 2-pin connectors, the max output is 2 1/2 amps 4-step fully automatic charging (initialization, bulk, absorption, float) Short circuit and reverse polarity protected and sp