Below is a clip taken from DigitalReviews on the solar powered Bluetooth GPS Receiver. It is one of the first of its kind and will definitely help travelers who can't carry or don't want to carry batteries.

"Why didn't anyone think of this before? Combine a Bluetooth GPS receiver that most of the time sits on top of a dashboard anyway, with an integrated solar panel and, voila, you have the longest battery life possible. Have a look at this first, in-depth review of this beauty from f-tech Corporation, based on the Trimble FirstGPS chipset. We put it through test drives and also checked it out in a pressurized Cessna Centurion to see how it behaved in real life." [via DigitalReviews]