Support Charging when abroad?

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http://androidforums.com – So was away over the weekend and had my TF-101 with me along with the charger. Tried charging the TF-101 via a standard plug converter (TF-101 has a standard UK three pin, while I was in a country that had two pin). Tried all combinations (with keyboard attached, just the keyboard and just the tablet) but it wasn't showing as charging. Now this could be a bit of a problem. Is this a known issue? Is there a way round it, short of getting a separate charger for when visiting foreign countries? Would it just drip charge if I had left it? Also, do any of these battery juice / power p (General)