Well Jim, it's been 14 years since I've been to Thailand (YWAM outreach, was there for 2 months) but I'm sure they are on 220v power.
If it's a battery charger your looking for, take a look at
Maha/Powerex Batteries I use these for work and they really outlast any rechargable that I've used to date.
They make an international charge which is good for both 110v and 220v so that may be a help.
I loved Thailand. To what area are they going? Once you get out of Bankok the country is truly beautiful and the people are very very friendly.
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