Trait-Tech 4200mAh Portable Detachable Style Rechargeable Backup Battery Charger Charging External Power Bank Hard Case Cover for Apple IPhone 5/5S/5C with Kickstand - White Fast Shipping ,Ship From USA Fully protective form-fitting case with an extended built-in rechargeable battery for your iphone 5/5S/5C;Ultra-thin, light-weight, low-profile design On/Off switch with One-Touch smart design;High efficiency and low self-discharge rate 5% per month Charge and sync your mobile phone to computer without removing it from the case;4 LED lights: each represents 25% of Juice (Power) left in the phone Overcharge protection: when the battery voltage is 3.7V ?? 0.5V, charging automatically stop;Long life: up to 500 times recycling use