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Packing 12.8V 40Ah LiFePO4 Li-Ion rechargeable battery Module is made of 4 pcs LiFePO4 Prismatic Module: 3.2V 40 Ah in 4S configuratuin with Stanless Steel Case & Nylon handle Voltage Voltage: 12.8 V (working) 15.2 V (peak) 10.0 V ( cut-off) Capacity 40Ah (512Wh) Cycle life > 2000 cycles (80% of initial capacity at 1C rate) Energy Density 81.20Wh/kg Prewired 8" long 6 AWG open end wire Red = Positive Black = Negative Charging rate 13.33A recommended, 40.0A Max Max. Discharging Rate 100 Amp limited by 6AWG wire Higher drain rate avialable upon requested Dimensions (LxWxH) 204mm(8.0") x 125mm (4.9") x 198mm(7.8") Weight 6305grams(13.9lb ) Smart Tips Please use Smart Charger (10 A) for 12.8V LiFeP Battery Pack worldwise use to charge the pack with 4.8 hrs charging time Due to the pack don't have PCM, Must use with our Battery Management System (BMS) below. Battery Management System (Master Module) for Li-Fe-P battery Pack up to 77V 500A rated) Battery Management System (Master Module) w/o relays for Li-Fe-P battery Pack up to 77V Applications A Perfect 12.8V Battery module with 100A Max drain rate for EV, HEV application You may build battery pack for higher voltage (series connection) or higher capcity (parallel connection) Warning 12.8V LiFePO4 Prismatic battery pack shall be cut-off at 15.2V during charging and 10.0V during discharging. If over discharge to 10V (2.5V/cell), please recharge the pack right away. Otherwise the battery is over discharge and cannot recover! Please click Knowledge on LiFePO4 battery to learn more detail