• I've got one exactly like that here (it cost around $3, delivered): http://www.ebay.co.uk/itm/262524282820

    It even featured in some videos :) https://www.youtube.com/watch?v=HKEHXOSL­zCQ

    However, having said that, both of mine have now died because I let them go flat. Yours might be better made, but mine had no protection circuitry on the battery so when it went flat (because the power supply seems to run all the time) it discharged the battery too much and basically self-destructed :(

    It's easy enough to get inside them and check though - mine are a few years old now so I'd imagine something would have changed.

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