Well, I have a Bangle here where I took it to bits, disconnected the battery and then power it from an external battery with a power meter, but that's about the only method I know of, and it's not easy at all :(
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.
Well, I have a Bangle here where I took it to bits, disconnected the battery and then power it from an external battery with a power meter, but that's about the only method I know of, and it's not easy at all :(