If you use a proprietary digital camera battery, you can buy a AC DC rapid travel charger. I bought a charger for my Nikon Coolpix 8700 camera (with EN-EL1 battery) from http://ebuybatteries.com/product/battery%5Fchargers/Nikon/ before I went to Thailand and China, it just provided me extreme convenience in my journey.
When I was in Zambia for three weeks I brought along a car converter for plugging into the cigarette lighter. This worked well for charging my digital camera batteries. Make sure the vehicle is 12 volt(some of the toyotas have a 24 volt systems) note-you may need to trip the ignition switch to make the vehicle recognize the plug in.
I've never had problems charging batteries anywhere, even in Cambodia. I used a very simple adapter--no problems.
I will say that with my old digi cam, it sucked the juice out of the rechargeable AAs! My new cam has a lithium ion battery, which lasts much, much longer. If yours has AAs, don't even bother with a charger. The rechargeables don't last nearly as long, so if you do go that route, make sure you bring plenty of them--which defeats the purpose.
Or you can choose not to pack the recharger and buy as you go. Not as ecofriendly, but as you'd have to pack enough to keep you going between charges anyhow, might as well buy along the way. You're probably going to have to do it anyhow. It used to drive me nuts!