I'm preparing to jb my KOA2 and began by looking over the mountable drive contents. I hadn't looked inside in a long time (Turns out I hadn't made the update preventor directory yet, so it's good I checked.
Anyway, there turned out to be a file
.fuse_hidden0000020c00000001
which I thought might have been put there by my laptop, but it has a 2017-10-13 time stamp, weeks before KOA2 release. Turns out it is a shell script.
Code:
#!/bin/bash
while true; do
CAPACITY=$(cat /sys/class/power_supply/max77796-battery/capacity)
if [ $CAPACITY -gt 70 ]; then
echo 0 > /sys/class/power_supply/max77796-charger/charging
elif [ $CAPACITY -lt 65 ]; then
echo 1 > /sys/class/power_supply/max77796-charger/charging
fi
sleep 30
done
The Voyage doesn't have a /sys/class/power_supply/max77796-charger directory and on the Voyage /sys/class/power_supply/max77696-charger directory doesn't have a charging entry.
Maybe I'm the only one that cares, but this looks like a good way to have a Kindle max out at 50% or so when on a charger long term.
Update:
Code:
echo 0 > /sys/class/power_supply/max77796-charger/charging
turns off charging and the kindle starts running on battery power instead of USB power.