Vietnam has mostly 220 volt, 50-hertz alternating current, although here and there it is 110 volts. Plug in only if you know the voltage of the equipment you wish to use. Not everyone in the countryside is connected to mains electricity. Power cuts happen regularly, especially in the South. Electrical current fluctuates greatly in some areas, which can be harmful to equipment. A good torch is certainly useful, especially for walks in the evening. The abundance of holes, bumps and ditches in and along the roads can cause nasty falls if the streetlights suddenly go out.