I could not test it yet, but this could be the culprit:

https://github.com/SolderedElectronics/ ... /issues/10

Kind regards

I tried your advice and added a 470uF capacitor - same outcome.
ESP32 does not go to sleep and just reboots.
The maximum current is about 100mAh, the voltage stays constant +- 0,02 V the whole time.
Any other ideas?

Hi,
Thanks for your suggestion. If I understand you correctly you think the board takes too much current on waking up?
Maybe I did not explain correctly in my first post - the issue is that the ESP32 does not enter deep sleep mode at all when running from battery.
Is there something that could ...

Hello everybody.
I have a strange problem with deep sleep - not me but a ESP32-WROVER module :-)
I have two Inkplate 6 devices. Both use the same type of LiPo Battery. On device A deep sleep works fine, after 15 minutes the device wakes up, gives me wake-up-reason 4 and refreshes the display ...