период полураспада...

[ex0_planet]

... thinkpad'овой батарейки составляет чуть менее 6 лет. Сегодня gnome-power-manager (на самом деле mate, но не суть) торжественно объявил о том, что осталось менее половины design capacity.

$ cd /sys/bus/platform/devices/smapi/BAT0/
$ grep '' *
barcoding:1ZHVK14TE0E
charging_max_current:2700
charging_max_voltage:12600
chemistry:LION
current_avg:0
current_now:0
cycle_count:3312
design_capacity:57720
design_voltage:11100
dump: 
first_use_date:2011-08-07
grep: force_discharge: No such device or address
group0_voltage:3920
group1_voltage:3937
group2_voltage:3924
group3_voltage:0
inhibit_charge_minutes:0
installed:1
last_full_capacity:28350
manufacture_date:2011-04-26
manufacturer:SANYO
model:42T4861
power_avg:0
power_now:0
remaining_capacity:19710
remaining_charging_time:not_charging
remaining_percent:70
remaining_percent_error:98
remaining_running_time:not_discharging
remaining_running_time_now:not_discharging
serial:
grep: start_charge_thresh: No such device or address
state:idle
stop_charge_thresh:70
temperature:33100
voltage:11781

Более трех тысяч циклов, Карл!