I'm thinking of getting one of these 2800 mAh solar chargers that I've seen with many different brand names at different stores, but none in brick and mortar stores. I would be using it for my HTC Advantage (charges at 5V, so it would be .8 A, not the 1 A of the stock charger but better than the .55 A charger I got to replace it). Anyone give me some recommendations?

Woterm, I'm in the military and we use the solar chargers for our "War Ready" vehicles/equip. We use off the shelf brands. Plus most are shrink wrapped. We never have an issue with low batteries.

Steve.