@skink Thanks for your answer

I just get my first M5StickC and I am wondering how to recharge the internal battery?

I try to connect to a USB IPhone 5v plug for 3 hours but I just get 5 minutes run time.

What do you recommend and how do you know when the battery is full?

Thanks in advance.

Hello
I just receive my M5Stack C, I went thru the install using Arduino but I always get an error during upload ( I run the Factory sketch test)

"esptool.py v2.6
Serial port /dev/cu.usbserial-3D52321EB6
Connecting........___
Chip is ESP32-PICO-D4 (revision 1)

A fatal error occurred: Failed to read register address 6001a00c (result was 01050000)
A fatal error occurred: Failed to read register address 6001a00c (result was 01050000)

I use 115200 speed, ESP pico Kit as board, M5StickC library is install

Any advice please.
Thanks in advance
Jean-Claude