QooPro Mobile Power External Battery Charger for iPhone,iPad,iPod, iTouch-EXTERNAL, PORTABLE, RECHARGEABLE One year warranty. 1000 mAh capacity. Compitable with most Apple products. Easy to use and quick charging. It is compatible for iPhone with membrane or case, you may keep talking on the phone while it is charging. Portable device, plug into your Apple devie and it start charging the battery automaticly. Rechargeable at least 400 times.