M5stack wont turn on on Battery.



  • power.ischarging() returns Ture
    power.getbatterylevel() returns 100
    Voltages (disconnected from USB, Device OFF since it wont turn on)
    GND & BAT is 4.05V
    GND & 3V3 is 0V
    GND & 5V is 0V

    When i press the on button it most of the time does not turn on. In about 1 in 50 tries it turns on but turns off when i press any button.

    FW UIflow 1.7.1-en



  • Hello @UmbraAtrox

    sorry to hear about your troubles. When you manage to turn on your unit running from battery, could you please measure the three voltages again? Maybe this gives us a hint about what's broken.

    Thanks
    Felix



  • I think i found the issue. when the Batteryboard isn't plugged in all the way(0.5 - 1 mm gap) it works . so i assume the Mbus connector has a bad connection. This device is about 2 weeks old. Bought on aliexpress but i do not know if the seller is you since i went with the first one search returned. "EC-Buying Ali Store"

    Device Off Battery working state
    GND & BAT is 3.97V
    GND & 3V3 is 0V
    GND & 5V is 0V

    Device ON battery powered
    GND & BAT is 3.97V
    GND & 3V3 is 3.3V
    GND & 5V is 5V



  • Hello @UmbraAtrox

    the voltages look correct - thank you for posting them.

    I guess you'll need to contact the seller and ask for a replacement.

    Felix



  • I think it's faster to just replace the mbus connector to a fullsize one if there is a smd version. Especially since aliexpress declined my dispute, not turning on seems to be not broken enough.