charger to power up USB devices while on the road. My main concern was charging my HTC Hero phone that I use for gps, phone, camera and web posting. Yes, it is a power hog.
In addition to the Hero, I have a iPod nano and a wireless phone mic that all need power.
What was needed was a way to add power to these items when I was on the road. it would be real handy on long tours when attaching to the grid may not be an option.
Results after a few weeks of testing:
The charger actually charges 2 AA batteries in about 2 - 3 hours of direct sun. I take the charger out of the sun after the indicator shows the batteries have a full charge. To charge the iPod, I plug it into the USB port, and leave it for about 30 minutes and that pretty well charges it up. For the Hero, it has been somewhat of a challenge. Through trail and error, I have found the best way to add power to it. From the fully charged AA s , I plug the Hero in to the charger with the Hero powered OFF. I leave it connected to the charger for 15 minutes. That adds about 10 - 15 % charge to the phone. Leaving it connected longer does not seem to add more charge... in fact I have noticed that it often removes some charge.
It is easy to add new rechargeable batteries to the device. The flexible panels make it portable and easy to attach to a rack or bag. I found it easy use, and swap out batteries when they are charged so that there are always power when I need to add power to my USB devices. It works !