FT2420E 24V 20Ah LiFePO4 battery pack replacement lead acid battery S/N Details Parameters Remarks 1 Nominal voltage 25.6V Mean Operation Voltage 2 Rated capacity Typical 20Ah Standard discharge（0.2C） after standard charge Minimum 19.5Ah 3 Charge Charge voltage 29.2±0.2V Charge Moe 0.2C to 29.2V, then 29.2V to 0.02C (CC/CV) Standard Charge current 4A Max charge current 10A Charge cut-off voltage 29.2±0.2V Recommended float charge voltage ( for standby use) 28.32±0.1V 4 Discharge Standard discharge current 4A Max continuous discharge current 20A Max. Pulse current 40A (＜30S) Discharge Cut-off voltage 16V 5 Cycle life ≥ 2000 cycles  0.2C 100% DOD 6 Operation Temperature Range Charge：0~45℃ 60±25%R.H. Bare Cell Discharge：-20~60℃ 7 Storage Temperature Range 0~35℃ 60±25%R.H. at the shipment state 8 Weight Approx：12.2kg 9 Size 250 x 250 x 100mm 10 Plastic Case ABS