POWER 1280-12.8V made by 4S2P LiFePo4 battery cells This pack is rated with 100ah lithium iron phosphate battery inside. POWER 1280-12.8V is different with battle born or expert-power 12v. Inside by 4S2P prismatic LiFePO4 cells. 6,000+ recharge cycles (roughly 8 year lifespan at daily use) vs. 500 for other lithium batteries or lead acid. It is a perfect drop in lead acid replacement battery pack. Lifepo4 12v 100ah battery is one of the best rechargeable deep cycle lithium iron phosphate battery.