With Verbatim's 4400 mAh Portable Power Packs, you can talk longer, listen to more music, play more games, and watch more videos without worrying about running out of battery life! Lightweight and compact, the Verbatim 4400 mAh power pack fits easily into a pocket or bag. A full charge provides up to 2 full iPhone charges, or similar for smartphones with an average 1400 mAh battery life. Use power packs to charge a wide range of devices such as iPhones, iPods, eReaders and micro-USB charged phones or wireless Bluetooth headsets. An LED status indicator lets you know how much charge time remains on your power pack, while push-on / auto-off functionality powers down the Power Pack when not in use - saving battery life.