I just picked this up from Walmart, yeah I know. I was short on time and needed something relatively cheap. I've been testing it out and so far I'm pretty happy with it. It takes 18hrs to fully charge via the sun and 2.5 hours via computer or wall outlet. It seems to have mixed reviews but so far I'm digging it.
http://www.walmart.com/ip/Scosche-So...arger/14262100
And here are some Amazon reviews,
http://www.amazon.com/Scosche-Powere.../dp/B0036ORMS0