Efo is at it again with another iPhone 4 accessory, this time it serves dual purposes actually to charge the iPhone 4 and it has a USB port to charge anything else that might need the extra juice.

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.

 

app thumb Multi Purpose iPhone 4/4G Power Pack with USB output app1 thumb Multi Purpose iPhone 4/4G Power Pack with USB output app2 thumb Multi Purpose iPhone 4/4G Power Pack with USB output bottom thumb Multi Purpose iPhone 4/4G Power Pack with USB output interface thumb Multi Purpose iPhone 4/4G Power Pack with USB output output thumb Multi Purpose iPhone 4/4G Power Pack with USB output packing thumb Multi Purpose iPhone 4/4G Power Pack with USB output side thumb Multi Purpose iPhone 4/4G Power Pack with USB output

 

Specification

  • Battery type : Lithium-ion battery

  • Weight : 74g

  • Product compatibility : iPhone 4/4G

  • Standby time : upto 390 hours

  • Talk time : upto 6.5 hours

  • Internet use : upto 6.5 hours on 4G and upto 8 hours on Wi-Fi

  • Audio play : upto 31 hours

  • Video play : upto 9 hours