Quite a while back I bought a solar charger. The battery pack has a USB port to which just about any device can be connected, which can be charged via USB. Looking for a loading facility for batteries, I came across the USB charger from Sanyo. The handling is very simple. USB plug to the battery pack connect and let recharge the batteries. The blue status LED indicates the charging is complete with a permanent lighting.
The presentation of the product I really like - simply reduced to the essentials. Very handy, I find the "storage possibility" for the short USB cable. Also positive is the possibility to invite AA or AAA batteries (by a simple folding mechanism).
