Why does the laptop turn off before the battery is completely discharged?

Question

linux

An HP laptop with openSUSE on board consistently kills batteries in 3-4 months. And not only does it start to work less, but it is stupidly cut down after less and less time off the network.
I tried to figure out what's going on:

# less /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         4436 mAh
last full capacity:      4436 mAh
battery technology:      rechargeable
design voltage:          10800 mV
design capacity warning: 616 mAh
design capacity low:     418 mAh
cycle count:              0
capacity granularity 1:  198 mAh
capacity granularity 2:  3820 mAh
model number:            MO06062
serial number:           16212
battery type:            LION
OEM info:                13-12

those. The battery seems to be steadily charging up to passport values.
I look at the status immediately after a sharp shutdown:

# less /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          charging
present rate:            382 mA
remaining capacity:      4026 mAh
present voltage:         12580 mV

those. zero is still very far away.
What could it be and what can be done about it?

Answer 1

1) Boot into sysrescd
2) Speed ​​up battery drain - burnP6
3) Watch the system - watch 'cat /proc/acpi/battery/BAT0/state'
The problem is probably only in hardware