rechargeable battery 1.Maintenance-free 2.Small self discharge 3.Safety and explosion proof 4.Good deep cycle performance rechargeable battery Caution:-Stay away from the ... degree.Key features:1.Full sealed,no leakage ,electrolyte free,2,Environment-friendly,no gas leaking out3.ABS material case,flame ... -corrosion,insulation,4.Used widely in UPS ,autos,electricity,telecommunication system