Advantage 1.High invert efficiency and rapid start; 2.Great physical performance; 3.Low self-discharge rate; 4.Reasonable price; 5.Professional li-battery customization. Item parameter remark 1 Rating voltage 48 v 2 Rating capacity13ahCustomized 3 Minimum capacity12.54ah 4 5Over-discharge voltage protection28 â±0.7v 6Over-discharge voltage protection release28-30 â±0.7v 8Input charging voltage42v â±1% 9Over-charge voltage protection42.5 â±0.65v 10 Over-charge voltage protection release41.9 â±0.65v Release load 11Discharging rating current20aAdjustable 12Over-current discharge protection50 Adjustable 13Over-current protection delay time20â±5ms 14Charging rating current2aCustomized 15Fast-charging current8aCustomized 16Short circuit current protectionEnable 17Working temperatureDischarge -20 --60â°c charge 0 -- 45â°c 18 Storage temperature0-45â°c 19 Cycle life More 500 times Cauction: 1-use a specified charger, fully charge the battery before first-time using. 2-do not disassemble the battery and battery pack in any way. 3-do not short circuit battery terminals, don't not reverse the positive and negative pole 4do not throw the battery into fire or heat, do not put the battery into microwave oven or pressure vessel. 5-do not immerse battery in water or allow it to get wet! 6-if the battery leaks or releases strange odor, pls remove it from place near fire place immediately. 7-keep the battery in a cool dry surroundings if it stands by. 8-do not place or storage this product under high temperature(or fire) or humid environment. 9-using the product, a little hot is normal. 10-stay away from children when charging or in storage.