Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of a LFP cell is 3.2V (lead-acid: 2V/cell). A 12.8V LFP battery therefore consists of 4 cells connected in series.This item is in the category "eBay Motors\Parts & Accessories\RV, Trailer & Camper Parts & Accessories\Other RV, Trailer & Camper Parts & Accessories". The seller is "homeimprovementwarehouse14" and is located in this country: US. This item can be shipped to United States.