The MiLi iPhone Power Packs is a rechargeable (via USB) external battery concealed inside a svelte protective hard-shell case, and it offers twice, the battery life of the iPhone alone - up to 390 hours standby time.

 iPhone Power Packs is also capable of charging other USB-friendly devices. Simply plug your gadgets iinto the MiLi's ‘out' socket and let its 2000mAh/1200mAh lithium polymer battery do the rest. Flash Harry Bigbuttons can even charge two iPhones at the same time.

The MiLi continues to cut the edge in other areas: an integrated LED displays charge status, while smart jiggery-pokery instructs the iPhone to always drain the MiLi's battery first, so if you do remove your iPhone its battery won't be sapped. What's more, once you plug your MiLi-clad iPhone into a USB socket both gizmos will be charged simultaneously.

Technical specifications:

Product name:            MiLi power pack
 
Input:                      DC 5V       0.5A
Output:                    DC 5V       0.5A                       
Capacity:                        2000mAh
 
Product Dimension       L126 x W66 x T23mm
Product Weight:          79.5g
 
Product Compatibility:  iPhone 2G, 3G, 3GS
Standby Time:            Up to 390 hours

Talk Time :             Up to 6.5 hours on 3G (
                                 Up to 13.5 hours on 2G

Internet Use                Up to 6.5 hours on 3G  
Up to 8 hours on Wi-Fi 

Audio Play                  Up to 31 hours 

Video Play                  Up to 9 hours