Our 100 ah 12 volt Battle Born is designed and assembled in Reno. NV. This LiFePO4 ?C lithium iron phosphate cycle is great for use in an RV. Boat or Off-grid power system. These can be used in 12. 24 36 and 48 volt systems. At only 29 . it packs the power of a 140 lb lead acid and lasts 10 times longer.