I recently finished the prototype for a battery powered ESP8266 based temperature and humidity sensor with eInk display. Currently working on a custom PCB. : r/arduino
![Battery capacity measurement using Arduino [Lithium-NiMH-NiCd] - Technology - PCBway](https://pcbwayfile.s3-us-west-2.amazonaws.com/web/19/10/08/1710191618336t.jpg "Battery capacity measurement using Arduino [Lithium-NiMH-NiCd] - Technology - PCBway")
Battery capacity measurement using Arduino [Lithium-NiMH-NiCd] - Technology - PCBway
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