If you're going to have access to any type of computer. just take the USB lead and re-charge from that. No need for any adaptor, anywhere.
When I go on holiday, I take a laptop, mobile phone, digital camera and Kindle, but the only power supply I take is for the laptop, all the rest can re-charge from that via USB. I've got small, light, cables for each of them - saves greatly on weight in my carry-on.
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