On 2015-07-13, Walter Alejandro Iglesias <roque...@gmail.com> wrote: > About Thinkpad's batteries.
I think very little can be said. Too much depends on the model, the condition of the batteries, and your usage pattern. There's a big difference whether you run make -j4 build or stare at vi in an xterm. Apart from CPU load, display brightness is probably the single biggest factor. The battery sensors may be useful: hw.sensors.acpibat0.volt0=11.10 VDC (voltage) hw.sensors.acpibat0.volt1=12.55 VDC (current voltage) hw.sensors.acpibat0.power0=8.86 W (rate) hw.sensors.acpibat0.watthour0=46.54 Wh (last full capacity) hw.sensors.acpibat0.watthour1=2.33 Wh (warning capacity) hw.sensors.acpibat0.watthour2=0.20 Wh (low capacity) hw.sensors.acpibat0.watthour3=46.18 Wh (remaining capacity), OK hw.sensors.acpibat0.watthour4=62.16 Wh (design capacity) hw.sensors.acpibat0.raw0=1 (battery discharging), OK This tells us that this, IIRC, approximately three-year-old battery in my X230 is now reduced to ~75% of its design capacity. > As I told you my experience with these laptops (and laptops in general) > is short so I don't know if I wasn't lucky or those in forums that > assure these batteries can give *15 hours* did the test in suspended to > RAM state :-). Maximizing laptop runtime can't be accomplished by one big button, but involves many small optimizations. Apparently the MS Windows installs shipped with most laptops are quite effective in this regard. Somebody wrote up possible power-saving measures for FreeBSD on a laptop. This doesn't directly apply to OpenBSD, but it gives you an idea of the complexity: https://wiki.freebsd.org/TuningPowerConsumption -- Christian "naddy" Weisgerber na...@mips.inka.de
