Canon USB/AA battery charger?
This applies to lots of these bigger batteries, but in this case I'm looking at the Canon NB-7L, that works with the PowerShot series. Litium-Ion, 7.4V, 1050 mAh. As far as I can tell, there is no way to charge this battery without these big wall chargers, although there are some off-brand variations which allow for power from a cigarette lighter adapter.
Anyone have any brilliant ideas on how one would go about getting power to one of these batteries, via charger or otherwise? My main problem seems to be that all the alternative power sources out there (solar chargers, mintyboost, yada) provide their power via USB, which doesn't seem to do me much good. I know there's beefy battery packs out there that would work, but in the interest of saving weight, I'd rather not spring for a brick that weighs more than my tent. Any input is greatly appreciated. Cheers.