This has been bugging me for my tour. I have a Sony Cybershot that I've had for nearly a year. It works pretty well and would like to take it on my tour. I don't plan on being in a motel often enough to effectively keep my battery charged. I don't want to restrict my documentation of the ride because of it though. Does anyone know of a solar charger capable of charging a proprietary battery? Are there adapters sold for many cameras to work on slow trickle chargers?