Technical Specifications Nominal Voltage 12.8 V Recommended Charge Current 7.0ANominal Capacity 15 AH @ 0.2C Max. Charge Current 14AEnergy 192 Wh Max. Continuous Discharge Current 14AInternal Resistance（AC）50 mΩ Peak Discharge Current 28A（3S）Cycle Life 2500+ Cycles @ 1C 100% DOD BMS Discharge Cut-off Voltage 10VMonthly Self Discharge Less than 2% Charge Temperature 0~45℃Efficiency of Charge 100% @ 0.5 C Discharge Temperature -20℃to60℃Efficiency of Discharge 96~99% @1 C Storage Temperature -20℃to60℃Charge Voltage 14.6 ± 0.2 V IP Class IP65Charge Model 0.2C to 14.6 V , then 14.6 V , charge current to 0.02C Maximum Modules in Series/parallels 4Sor 4P