For my Nokia IT and N82 phone, I use a solar power charger which gets me about 10-15hrs per charge, Universal USB Charger Kit, Emergency Cell Phone Charger (4-AAA gets about 30 mins) (I also have a few other travel, car/plane/plug/battery, chargers that I have not yet tried that might work out)

here are the links to get you started...

http://www.solio.com/charger/

http://www.cellphoneshop.net/