Im looking for an ESP32 board that has built-in lithium battery charging circuitry and built-in capabilities to read the battery level. Ideally a very small board and it shouldn't use more power than necessary. A lipo connector would be nice.
So far I could only find boards with a built-in charging circuit, but none with a built-in battery level reader.
I don't want to solder resistors in order to read the battery level and I also don't want to use other external chips/boards.
Any suggestions? 
The adafruit boards have built in battery monitors. This board has a built in LC709203 which is read over I2C to monitor the battery.
@ryancasler Thank you, would it be possible to have a switch that powers the ESP down completely, but would still allow for the battery to be charged via USB?
Turns out the board uses an ESP32-S2 instead of a classic ESP32. This means it doesn't have Bluetooth, which I really need.
There is also a version with the classic ESP32 or the ESP32 S3.
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