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.