External Power Pack for iPhone 4 doubles the phone’s battery runtime

The market has an influx of iPhone 4 cases and covers, yet there is a limited amount of iPhone accessory out there that’s as useful as this EFO-Shop's External Power Pack for iPhone 4. The sleek Power Pack snaps up discreetly onto the back of your iPhone to give the user double the battery runtime currently garnered. Measuring only a few millimeters of thickness, the Power Pack is first to power the iPhone 4’s receding battery before the internal battery comes into action.

external power pack for iphone 4

Specifications:

• Battery type: Lithium-ion battery

• Weight: 74g

• Product compatibility: iPhone 4

• 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

Thanks: Alex