LinuxConfig -

IBM ThinkPad x60s laptop battery life time / capacity test. Here are couple tests produced by powertop intel's linux utility on IBM ThinkPad x60s laptop to estimate its battery life time.

Conditions:

• Debian Lenny stable OS installed
• running KDE 3.5 with single terminal window
• low screen brightness
• wireless Ethernet card ON
• used ThinkPad 42T4506 IBM ORIGINAL LENOVO GENUINE THINKPAD LAPTOP NOTEBOOK X60 / X61 LITHIUM ION BATTERY
• battery fully charged
• 2x Genuine Intel(R) CPU L2400 @ 1.66GHz
• Kernel - Linux 2.6.26-2-686 #1 SMP

Cn                Avg residency
C0 (cpu running)        ( 2.1%)
polling           0.0ms ( 0.0%)
C1 halt           0.0ms ( 0.0%)
C2                0.0ms ( 0.0%)
C3                8.9ms (97.9%)
P-states (frequencies)
Wakeups-from-idle per second : 110.8    interval: 15.0s
Power usage (ACPI estimate): 12.6W (6.1 hours)

When following a powertop suggestions the battery life time is increased:

echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
ethtool -s eth0 wol d
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
mount -o remount,noatime /
echo 5 > /sys/bus/pci/drivers/iwl3945/0000:03:00.0/power_level
echo 5 > /proc/sys/vm/laptop_mode

Increase of battery life time for more than 2 hours:

Cn                Avg residency
C0 (cpu running)        ( 0.9%)
polling           0.0ms ( 0.0%)
C1 halt           0.0ms ( 0.0%)
C2                0.0ms ( 0.0%)
C3               16.1ms (99.1%)
P-states (frequencies)
Wakeups-from-idle per second : 61.4     interval: 15.0s
Power usage (ACPI estimate): 9.1W (8.4 hours)

NOTE: the battery used for this test was alredy used and it's not new. Therefore actuall baterry life time can be incresed when using brad new battery.