 12V LiFePO4 batteries are also gaining popularity as a second (house) battery for a caravan, motor-home or boat.Single "14500" (AA battery–sized) LFP cells are now used in some solar-powered landscape lighting instead of 1.2 V NiCd/NiMH.LFP's higher (3.2 V) working voltage lets a single cell drive an LED without circuitry to step up the voltage.