On Mon, Mar 16, 2015 at 11:55:06AM -0400, Stefan Monnier wrote: > Is there a good utility out there to predict the remaining > running/charging time of my battery? > > For the "remaining runtime" most of the utilities out there seem to just > divide the remaining capacity by the current power usage, which doesn't > account for the fact that the current power usage may not be > representative of the longer-term average (e.g. my power usage may > switch regularly between 6W while editing a file (i.e. mostly idle) and > 15W while processing the result, neither of which is representative of > the longer term average which may be something like 10W). > > So a good utility would need to monitor/learn your "typical" average usage, > and remember it in some kind of file. > > For the "remaining charge time" the problem is fundamentally similar, > tho details are quite different: > - the charging rate changes over time (as the battery gets full, it > charges more slowly). So dividing the missing charge by the current > rate is not a good predictor (as is often done). > - the charging rate may also depend on the computer's own power usage > (e.g. the sum of the power's own use and the battery's charging use > may be bound by the power adapter's max power output). > - sometimes reaching 100% of charge takes a long time, but reaching > (say) 90% is much faster. > So for the "remaining charge time" I might like to have a more detailed > info, telling me (for example): > - how much time remains before I get to 90% while I keep using the machine > - how much time remains before I get to 90% if I put it to sleep > - how much time remains before I get to 100% while I keep using the machine > - how much time remains before I get to 100% if I put it to sleep > And again, this info usually can't be just computed from current data, > it instead needs to be learned by monitoring the system's behavior > over time. There's a great utility called "ibam" which pays attention to the historical performance of your battery. The main benefit is if your battery is dying and the last 10 or 20% only lasts a couple of minutes, then the adjusted runtime takes this into account. The package needs a bit of love (the best way to run it is to use the gkrellm plugin - see bug 260530) but it might suit you. > > > Stefan > > > -- > To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org > Archive: [🔎] jwvpp899chm.fsf-monnier+gmane.linux.debian.user@gnu.org">https://lists.debian.org/[🔎] jwvpp899chm.fsf-monnier+gmane.linux.debian.user@gnu.org >
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