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.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
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.