ESP32 Thing Plus VBat pin: can I draw current from it?

Development Boards ESP32
1

Hi all,

I wanted to use an RTC with the ESP32 thing plus. As I am powering my project with a lipo, i thought I could feed the lipo as the backup battery to the RTC (through a LDO). However, I am not sure it is recommended, and I am not sure what would happen to the RTC when the usb is charging the lipo: if I plug the RTC on Vbat, will the charging circuit current be dangerous to the RTC? or will additional circuitry connected to Vbat directly prevent battery from charging? If plugging the RTC directly into Vbat isnt an option, is there another way I can power the RTC with the lipo even when the thing plus is powered off, while usb can still charge the battery?

thank you!

2

You need a [lithium coin cell for battery backup, don’t use your main battery.](https://www.sparkfun.com/products/338)

3

Thanks for your reply! is there an explanation why? is it for hardware integrity purposes? because a LDO will feed a 3v in the rtc! The battery has a voltage protection circuit too.