A new slip-on iPhone charger has been introduced called the Powcell light-powered mobile phone charger. The device is designed to allow the continuous charging of a phone and to reduce the chance of a low battery issue.

The internal battery of the Powcell is charged by exposure to light and the battery is charged even when the phone isn't inserted into the sleeve. The company that makes the Powcell has units for the iPhone and Blackberry devices.

On the rear of the sleeve is a solar panel that collects light with a large surface area. In addition to charging from sun, the device can also charge with some forms of ambient light as well. The iPhone case model works with the iPhone 3G and 3GS.

via Motion Touch