This is an interesting idea: Thanko has a “universal” charger that should work on any battery that has the contacts placed like the one in the photo. On the charger-side, the contact points can be moved to fit most batteries. Light indicators will tell you where the charging is at. Available in Japan only for $18.
If you want to see crazy USB gadgets: more thanko stories.
Related articles:Sony hand-cranked USB charger
Ericsson’s Connected Me concept could turn you into a human USB
Thanko USB Cool Cushion 2 ups the ante
Seen at: newlaunches 
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