Sorry if this is a question better suited to Electronics.SE.
I'll be travelling from my home country of Australia to the Philippines tomorrow, and been looking for a suitable travel adapter. Unfortunately given the time constraint the only I've been able to find for type A/B sockets is a US adapter. This would be fine, except the adapter is explicitly labelled as being for 110-125V. Australia uses 240V, while the Philippines is on 220V as best I can tell - a small enough difference that it shouldn't be an issue for charging small devices like phones. My question is, is using a 110V adapter likely to cause any problems when the source and destination voltages are the same, but different (higher) than the adapter's rating?
For those curious, I did use one of those adapters and it all worked fine in the end - didn't blow up any devices (or itself), and didn't get too hot while plugged in. I do recommend caution all the same when dealing with adapters of unknown quality - but it looks like as long as the adapter isn't one with a voltage transformer and the source/destination voltages are roughly the same, the situation described in this question should be OK.