I actually use a solar charger (via a 4016) on the lion battery and not the esp32c3 charging circuit. This way I accuratly measure the current battery voltage on the divider. It’s been working for months now without a hitch. The module drives 2 neopixels running white at 50% brightness for 15 seconds (retriggerable in the dark) and updates my server on motion and clear via espnow. With about 5-6 triggers per night, the battery rarely drops below 3.7v.