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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.
@Coder2012
I took your advice, I now have a packet of these connectors and a couple of batteries from my Galaxy S4.
The ratings are 3.8v and 2600mAh, they have 4 connection points with + and - marked, but I don't know what the other 2 are for. Do I charge and discharge from the same connectors or is there something else I need to do?