Lithium battery features: 1.Life expectancy is two times that of lead-acid batteries.The weight is more lighter 2.No memory effect and rechargeable.the battery life is more longer 3.Safer and more environmentally friendly, No heavy metals and hazardous substances. 4.Built-in IC chip will prevent battery pack over charge, over discharge, over-current, over-heat, short circuit. 5.Avoiding mechanical accidents caused by vibration. Basic Characteristics Weight:3.5kg-6.7kg Charge Temperature: 0~45degC Discharge Temperature : -20~65degC Retention of charge (store in one month) >95% Technical Data Rated Voltage: 48V Rated Capacity :5ah/13ah/18ah/22ah/26ah Way of Charge : CC/CV(Constant Current;Constant Voltage) Standard Charge Current : 2A Max Charge Voltage: 42V Cell OverCharge Protection Voltage : 4.2V/Cell Warnings 1.Do not immerse the battery in water or seawater, keep the battery stands by in a cool dry surrounding. 2.Does not use or leave the battery near a heat source as fire or heater. 3.Use the battery charger specifically for that purpose when recharging. 4.Do not reverse the position and negative terminals. 5.Do not connect the battery electrodes to an electrical outlet. 6.Do not discard the battery in fire or a heater. 7.Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects. 8.Do not transport or store the battery together with metal objects such as hairpins, necklaces, etc. 9.Do not strike, trample or throw the battery. 10.Do not directly solder the battery and pierce the battery with a nail or other sharp objects. If you needthe battery connect plug, please contacct the seller. One battery connect plug is $12. 
