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I'am using a Linage Android image (rooted) to control the battery charge and discharge with the commands:

Charge:

echo 0 > /sys/class/power_supply/battery/batt_slate_mode

Stop charging:

echo 1 > /sys/class/power_supply/battery/batt_slate_mode

The problem that after sending the command to charge, the charge type changes from "AC charge" to "USB Charge" and the current level drop to less than 500mA. I am connected AC power outlet. If I disconnect and connect again the power outlet the current goes to 1A.

Reading the following article bellow some devices are a file to change the voltage (/sys/class/power_supply/battery/voltage_max), but mine doesn't have.

https://www.androidpit.com/forum/770904/root-battery-life-improve-battery-life-by-reducing-the-charge-termination-voltage

The picture show the files that I have on the folder: ls /sys/class/power_supply/battery/

Samsung Tab E 7.0 SM-T113NU

Android 7.0.1 - Linage 14.1

App and ADB rooted

Best regards,

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  • I would suggest you to try the Magisk module mentioned in answer here, it's far easier than trying to figure it out yourself. Slate_mode is messy in the sense it doesn't seem to work as expected always//If you are keen to do it your way only, this answer may help
    – beeshyams
    Jun 27, 2020 at 17:36
  • Hi, I'm using the ACC Magisk as recommeded. The problem persist. Even i connect to the power outlet it appears "USB Powered" with slow charge. I've tried change the current and voltage but doesn't work either. dumpsys battery AC powered: false USB powered: true Wireless powered: false Max charging current: 0 Max charging voltage: 0 Charge counter: 0 status: 2 health: 2 present: true level: 86 scale: 100 voltage: 4100 temperature: 320 technology: Li-ion
    – João Paulo
    Jun 30, 2020 at 19:44
  • Go to ACC app forum on XDA and search for the Telegram group. Post your details in Telegram to get a quicker reply from developer. Samsung does some funny stuff and he can answer best
    – beeshyams
    Jun 30, 2020 at 19:49

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