Best Solar Chargers

The FatCat Solstice 2.5 was the overall winner in our evaluations. The unit unfolds to reveal two solar panels and packs the largest-capacity battery, which is two to three times the size of that of an average cell phone. The solar charger gave our Zune a playing time of 100 minutes, the second-longest playing time of the products tested. The trade-off to having a large battery: The FatCat is a bit heavier than the other devices tested, weighing about half a pound.

Specifications: Includes 11 connector tips and a USB charging cable (for USB chargers), and the choice of 4.5, 5, 6.3, and 9V outputs. The included tips work with iPods, MP3s, BlackBerrys, and Nokia, LG, mini Nokia, PDA, PSP, GPS, Sony Ericsson, Samsung,