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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.
@DrAzzy
I'm not sure if this is even the best place to buy them, but a guy on Tindie is selling those crazy new flexible batteries that you can use in wearables and they bend with you and all. Or nail in place and still have them work.
https://www.tindie.com/products/405Nm/105mah-375v-ultra-flexiblecuttable-battery/
I have no association with this guy (I sell on tindie, but no association with him) - but it looked like the kind of thing some people on here would like, since the Pico has the battery life to really do a lot with that 105mAh... though they ain't cheap!