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Re:Ask HN: I want to build an electronic wearable, where do ... by petra on Saturday February 09, 2019 @10:31AM (#19122736)
What do you mean by flexible ?

As for the wristband, have a look at hexiwear, and the hexiwear battery pack(which may be wearable). it has BLE and it does support "Firmware Over the Air update", i think.

Re:Ask HN: I want to build an electronic wearable, where do ... by daviddumon on Sunday February 10, 2019 @03:33AM (#19126904)
In my mind, it was something like that :

https://news.panasonic.com/global/press/data/2016/09/en16092...

Flexible batteries you can embad in a tissue wristband for example. But I don't know if it's possible to do so.

Thanks for the link I will check it out asap.