Battery pack specification： Nominal Capacity (AH): 10.4AH-14Ah Nominal Voltage (V): 52V Cell assemble: 14*4Series*Paralles) Cell Model: brand 18650 3.7V 2600MAH 2900mAh 3000MAH 3200MAH 3300MAH 3500MAHCell Cell Quantity (series*parallels): 56 pcs Battery Size: 70*110*265mm or customized Discharge Cutoff Voltage (V): 42±1V Charge Cutoff Voltage (V): 58.8V Rated Discharge Current (A): 20A Maximum Continuous Discharge Current (A): 30A Peak Discharge Current (A): 45A Charge Mode: CC-CV Standard Charge Current (A): 2A Charge Time under Standard Charge Current: 5hours Charge Temperature Range: 0-55° Discharge Temperature Range: -20-60° Battery Net Weight (include BMS) (kg): Approx.3.8kg Charging Cycles: >700 times Recommended For Motor: 350W -1000W Battery pack pic vivew: Shipping method: We will ship battery packs by UPS/FEDEX/DPD/battery special-line service,other Non-battery goods will be shipped by DHL/fedex.depends on different countries. And goods will be shipped within 7days. Warnings Do not immerse the battery in water or seawater, keep the battery stands by in a cool dry surrounding. Does not use or leave the battery near a heat source as fire or heater. Do not reverse the position and negative terminals. Do not connect the battery electrodes to an electrical outlet. Do not discard the battery in fire or a heater. Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects. Do not strike, trample or throw the battery. Do not directly solder the battery and pierce the battery with a nail or other sharp objects 
