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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.
@Gordon
Are you using firmware 2v01? New firmware might be a bit better.
It's pretty hard to do this 'blind' - do you have an oscilloscope? Ideally you could get a nrf52dk and the power minute board, and it'll help to give you really good stats on what is using the power