... battery charger case for iphone 4 1.Capacity:1800mAh 2.Input Voltage:5V 3.hight quality Best Rechargeable external backup bettery for iphone It will ... again.The perfect solution for day trips,hiking,sporting events,the beach, bike riding, business people,and people with no access to a ... ,facebook,or listen to music and watch videos. This stylish case ensure you are always with power in case of emergency ...