Voltage of 5V pin when only connected to battery

[msfujino]

@mariosangiorgio

If I connect the battery to BAT+ do I need to add any protection diode or is a straight connection fine?

I don’t think a diode is necessary.

As you can see in the link below, the sleep current of ESP32C3 is less than 50uA. if you have PPK2, you should check the current consumption of XIAO and display unit respectively.
The sleep current of the display unit chip is 3uA, so the rest might be the display panel and the boost circuit. Or maybe it is not sleeping properly.

Comparison of Sleep Currents for XIAO ESP32C6, S3, and C3

Now that I have three different XIAO ESP32s (C3, S3, and C6), compared their sleep currents. I hope this will be helpful when considering low-power applications. First, I analyzed the schematic and datasheet as a reference. A 3.3V analog regulator XC6210 is used in C3, and this regulator’s quiescent current of 35uA accounts for most of the C3 sleep current. However, a diode NSR0520 is used, which has low reverse current, giving it an advantage in this area compared to S3 and C6. The power sup…