I don't know how long your trip to Singapore is, but if you are a gadget seeking person you should drop by Sim Lim Square shopping mall. Which is a great place to pick up universal input power adaptors. I.e. single plug adaptor or multi-way power bars into which you can plug just about any kind of plug.

I've just started to see them elsewhere, but for ages Asia seemed to be the only place you could buy these. I often travel with a 3-way. I have all sorts of plugs so it's a real boon.