230volts 50hz used in Singapore so maxabeam charger should work fine, some of the maxabeam chargers have a switch to set it between 100 - 220volt so just make sure its set to 220volt.
also here is a link to the peakbeam site who make the maxabeam they have lots of info on there to help you out.
http://www.peakbeam.com/
i just got my maxabeam from a seller on ebay. will be trying it tonight. might post some beamshots. im really excited. i shouted whoohee when i turned it on. its heavier than expected. [inappropriate additional comment removed - DM51]
I recently had the opportunity of purchasing an almost new Maxabeam here in Australia for Aus$1950 (US$1500). I let it go as it was a Gen 2.
Was this a good move or should have I snapped it up? to import a new Gen 3 from the states would probably cost me about Aus$5000
Oh well, I'll just have to stick with my vechile (roof) mounted Lightforce 170