Single Cell Lithium Batteries 

Below are LiFeP04 Lithium Iron Phosphate Battery Cells and Lithium Ion Battery Cells.  They are Grade A quality cells and are the safest, longest lasting Lithium Batteries on the market.   Both types of Battery Cells, carry a 5 Year Warranty against defects or workmanship failure. 
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  3.2 Volt Lithium Iron Phosphate Cells 

  3.7 Volt Lithium Iron Cells