Unreal power discharge / charge current



  • I have received a new m5stick-c from M5Stack Official Store and was shocked by unreal discharge and charge currents
    There are 127 mA and 9 mA (from discharging state) in the official example
    In my first m5stick-c there were 82 mA and 87 mA
    Is anybody have an idea how to improve this terrible situation?!
    0_1561964758549_discharge.jpg
    0_1561964778290_charge.jpg



  • I'm charging a battery for 2 hrs from off state already and vbat still 3.46V (((



  • @vvs551 I too have noticed similar low charge rates occasionally on my device as you have captured in the second of your pictures. I believe the M5StickC limits it's charge current when the temperature is excessive. I can see in the bottom picture your device is reporting a temperature of 61.3Deg C.



  • @multihelix
    Why not, but .. why?? )
    It's nothing doing in this sketch )



  • I made some tests: The discharge current depends on the Screen Brightness:

    idischg: 42mA @ ScreenBreath(7)
    idischg: 44mA @ ScreenBreath(8)
    idischg: 51mA @ ScreenBreath(9)
    idischg: 58mA @ ScreenBreath(10)
    idischg: 65mA @ ScreenBreath(11)
    idischg: 75mA @ ScreenBreath(12)
    idischg: 90mA @ ScreenBreath(13)
    idischg: 105mA @ ScreenBreath(14)
    idischg: 116mA @ ScreenBreath(15)

    The charge current depends on the temperature:

    icharge: 86mA @ 31°C
    icharge: 86mA @ 44°C
    icharge: 8mA @ 46°C
    icharge: 8mA @ 48°C
    icharge: 8mA @ 52°C

    A bright screen is heating up the Stick quite fast.

    Hope that helps...



  • @hague said in Unreal power discharge / charge current:

    I made some tests: The discharge current depends on the Screen Brightness:

    idischg: 42mA @ ScreenBreath(7)
    idischg: 44mA @ ScreenBreath(8)
    idischg: 51mA @ ScreenBreath(9)
    idischg: 58mA @ ScreenBreath(10)
    idischg: 65mA @ ScreenBreath(11)
    idischg: 75mA @ ScreenBreath(12)
    idischg: 90mA @ ScreenBreath(13)
    idischg: 105mA @ ScreenBreath(14)
    idischg: 116mA @ ScreenBreath(15)

    The charge current depends on the temperature:

    icharge: 86mA @ 31°C
    icharge: 86mA @ 44°C
    icharge: 8mA @ 46°C
    icharge: 8mA @ 48°C
    icharge: 8mA @ 52°C

    A bright screen is heating up the Stick quite fast.

    Hope that helps...

    is that 86mA or 8.6mA as thats quite a jump?

    BTW thanks for taking the time to do all this testing.