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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.
@johan_m_o
I've pulled down my LCD brightness to .5 (I find that more than enough with the reflective display), changed Twist threshold to .2 and Twist timeout to 500. Using the Anton clock and always connected to Bluetooth. I don't use any pedometer or heart rate monitor stuff. Easily lasts 7-10 days wearing it from getting out of bed until going back to sleep.
Edit: maybe the wake on touch turns on the display a lot, unintentionally. That could really impact battery life.