carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ cat start_charge_thresh
cat: start_charge_thresh: No such device or address
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ cat stop_charge_thresh
95
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ uname -r
3.2.0-2-amd64
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ sudo echo 40 > /sys/devices/platform/smapi/BAT0/start_charge_thresh
bash: /sys/devices/platform/smapi/BAT0/start_charge_thresh: Permission denied
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ sudo sh -c "echo 40 > /sys/devices/platform/smapi/BAT0/start_charge_thresh"
[sudo] password for carlos:
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ cat start_charge_thresh
cat: start_charge_thresh: No such device or address
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ tail /etc/sys
sysctl.conf  sysctl.d/    sysfs.conf   systemd/
carlos@event-horizon:/sys/devices/platform/smapi/BAT0$ tail /etc/sysfs.conf
# devices/system/cpu/cpu0/cpufreq/scaling_governor = userspace
# devices/system/cpu/cpu0/cpufreq/scaling_setspeed = 600000
#
# Set permissions of suspend control file
# mode power/state = 0660
# owner power/state = root:power

devices/platform/smapi/BAT0/start_charge_thresh = 40
devices/platform/smapi/BAT0/stop_charge_thresh = 95