Thailand has 220 volt, 50 hertz alternating current. At least, it does when there isn’t a power cut, which occur quite regularly. The electrical charge can fluctuate greatly in some places, which can be harmful to electrical equipment. As a result, it can be very handy to keep a torch with you, also for times when you wish to go for a walk in the evening. The large frequency of holes, bumps and ditches on the roads can cause nasty surprises if the street lighting fails.