M-1900: 1900mAh iPhone Backup Battery Extender

M-1900: 1900mAh iPhone Backup Battery Extender Never run out of batteries for your iPhone (2G or 3G) with this battery extension pack. Add this stylish battery extension to the end of your iPhone and get 2-3 times the battery life. Features: - 1900 mAh battery extends your iPhone (2G or 3G) battery life 3-4 times - stylish aluminum body to match your iPhone - LED indicator lights show battery life - charge the extender while you charge your iphone with dual input/output adapters - rapid charge your iPhone with this unit in 2 hours Specs: - Capacity: 1900 mAh (charges in ~4 hours) - Dimension: 67 x 62 x 15 mm - Weight: 65 g - Input: 5V 800mA - Output: 5V 500mA