Here's what I'm looking for: A solar rechargeable battery system that will charge 2-4 AA batteries or 2 D batteries, at near-47-degrees N latitude (North Dakota), even under less-than-ideal conditions, in less than 6 hours, for under $100. I would prefer an off-the-shelf solution, but if I have to cobble something together to get it, as long as I know in advance that it will do what I need done, then I'll build it. Seems like most of the small battery solar chargers are ~$30 cheesy plastic trickle-chargers that barely work in full desert sunlight, or they are relatively expensive portable systems aimed at the backpacking/camping market. The D-cell requirement also seems to be limiting my options. This is to be used as a stop-gap measure in the short term, and as an auxiliary or semi-portable secondary system once I upgrade the household to a more powerful permanent setup. Anyway, I've searched quite a bit, and can't really find anything that would seem to do the job. If any of you has seen, heard of, or has experience with a similar system, I'd be happy to hear your responses. Thanks in advance for your help!