Hey Estel.

Thanks for thanks
And thanks for this script.

Just one question/remark:
why don't You put it directly in /usr/sbin/, as this script requires root privileges anyway?

and another hint for output of notifications:
You do not need to fiddle around with spaces, tabs for nice formatting. New lines can be achieved by just new line inside string (not \n). Like:
############## Printing output ##############
run-standalone.sh dbus-send --type=method_call --dest=org.freedesktop.Notifications /org/freedesktop/Notifications org.freedesktop.Notifications.SystemNoteDialog string:"Temperature: $(($TEMP * 250 / 1000 - 273))°C
Voltage: $VOLT mV
Current: $AI mA
Status: $STS, SoC: $CSOC%
Charge: $CACT mAh, Full Charge: $LMD mAh
Remaining Time: $RT minutes
$HL
Calibration needed: $FLAGS_CI, VDQ: $FLAGS_VDQ" uint32:0 string:""