... -charge protection, Discharge protection, Over-current protection, Short circuit protection, Explosion protectionAluminum Alloy coverslim power bank 4000mah lithium ... this mobile charger.Ultra-thin touch screen power bank 7.5mm, touch button control Product Namepower bank chargerColorBlue, ... ~ 40°CStorage Temperature-10°C ~ 50°CVolume116*65*7.5mmWeight165gBattery indicator1 light ,0-25% 2 lights ,25%-- ...