Can I measure the battery level of an ESP 32 borad with Li-ion 3.7V battery without external resistors?

Asked Jul 27 '23 at 05:57

Active Jul 27 '23 at 05:57

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I have an ESP32 board powered by 1000 mAh li-ion battery like to measure the battery voltage, to be able to inform the user of "Low battery".I think it can be done by doing a "voltage divider" to have a voltage between 0V and 1V (instead of 0V to 4.5V) and feed this into one of the device's ADC. Question: could this "battery measurement" be done without any external resistor, and just the ESP32/ESP8266 (+ cables between pins, if needed)?

Get method to get battery level without external resistance

asked Jul 27 '23 at 05:57

AMITABH SHAHI

Does this answer your question? [How to measure battery voltage with internal adc ESP32](https://stackoverflow.com/questions/56833346/how-to-measure-battery-voltage-with-internal-adc-esp32) – hcheung Jul 28 '23 at 03:10

Can I measure the battery level of an ESP 32 borad with Li-ion 3.7V battery without external resistors?

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