I get lots of emails everyday and I got one yesterday that I didn’t get to but wanted to share with you today because quite frankly, I think it’s pretty darn cool! Now I know everyone has seen extended battery cases for the iPhone 4. I know what you have seen the 2pc cases. But this one is a little different. From our friends at the EFO-Shop, it is an extended batter case for the iPhone 4 that has a USB slot that can not only power and recharge your iPhone 4, but can also power another device via the USB slot. MP3 Players, Tablets, or anything with an internal battery that needs some extra power via USB. Priced at $30.00, it sounds like a pretty fair price for some extra USB power supply.

Head on over to EFO-Shop for more information or to get one of very own.

iPhone 4/4G Power Pack with USB output, also charger for mobiles, camera, any USB gadget, etc

The sleek power pack snaps inconspicuously onto the back of your iPhone, adding only a few millimeters of thickness, but more than doubling the battery runtime.
If prioritizes consumption, pulling power from the Power Pack first, maximizing the iPhone’s internal battery.
This power pack also can serve as emergency use for other 5V devices (e.g. charge of mobiles other than iPhone, power pack for emergency light, camera, any USB gadget etc.).

Specification

  • Battery type : Lithium-ion battery
  • Weight : 74g
  • Product compatibility : iPhone 4/4G
  • Standby time : up to 390 hours
  • Talk time : up to 6.5 hours
  • Internet use : up to 6.5 hours on 4G and up to 8 hours on Wi-Fi
  • Audio play : up to 31 hours
  • Video play : up to 9 hours

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