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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.
@Olivierp
Thank you for your answer.
I am a complete newbie. Can you just confirm:
Can I connect a battery ( in my case 4 AA batteries daisy-chained ) to VBAT / GND ?
Can I connect the batteries to VBAT/GND while USB is connected to my PC ?
I would rather not toast my board too quickly. Thanks for your help.