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-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   Battery consumption analysis (https://talk.maemo.org/showthread.php?t=43748)

torpedo48 2010-02-08 11:49
Re: Battery consumption analysis
 
Quote:
Originally Posted by zehjotkah (Post 516020)
and how much battery das battery-eye use?
noticeable?
Can't notice it, so I'd say it use very little battery, but I can not be sure.

zehjotkah 2010-02-08 12:36
Re: Battery consumption analysis
 
I'm in with analising

cardiff-blues 2010-02-08 12:48
Re: Battery consumption analysis
 
1 Attachment(s)
Just run some tests of running a converted DVD 'Lord of the Rings' constantly and seeing how long the battery would last with wifi and most things disabled.

It lasted about 4 hours and 10 mins.

ossipena 2010-02-08 12:50
Re: Battery consumption analysis
 
could you share what your application exactly measures? (where does those readings come?)

cardiff-blues 2010-02-08 12:52
Re: Battery consumption analysis
 
Quote:
Originally Posted by ossipena (Post 516130)
could you share what your application exactly measures? (where does those readings come?)
Install Battery-eye and you can see these reports of your battery use.

ossipena 2010-02-08 12:54
Re: Battery consumption analysis
 
Quote:
Originally Posted by cardiff-blues (Post 516132)
Install Battery-eye and you can see these reports of your battery use.
no, where does the reports appear to battery-eye?

is there a random number generator? does it read something from dbus? does it read something from /dev/? etc

mece 2010-02-08 12:56
Re: Battery consumption analysis
 
Quote:
Originally Posted by ossipena (Post 516130)
could you share what your application exactly measures? (where does those readings come?)
I'm just guessing here but if I'd make that program, I'd use
Code:
lshal | grep battery.reporting.current;date
every 10 minutes or so, and store the values.

spanner 2010-02-08 12:57
Re: Battery consumption analysis
 
Quote:
Originally Posted by ossipena (Post 516130)
could you share what your application exactly measures? (where does those readings come?)
Looks like it reports 3 values from "lshal -u /org/freedesktop/Hal/devices/bme" :

battery.voltage.current
battery.reporting.current
battery.charge_level.percentage

Corwin 2010-02-08 13:03
Re: Battery consumption analysis
 
Large Kudos to the author. This application has lots of potential (estimating usage at current level etc.). Thanks!

Rob1n 2010-02-08 13:42
Re: Battery consumption analysis
 
Quote:
Originally Posted by Rob1n (Post 515928)
Yesterday, the phone charged up overnight and remained pretty-much fully charged from 3AM to about noon (I'm a late starter at the weekend), whereas last night it charged up at about the same time, but immediately started dropping off. You can also see the change in discharge rate when full-time MfE checks kick in.
It's interesting looking at the different graphs - the mAh graph doesn't show any drop off after charging, but I'd guess this is "backdated" after unplugging, as this bme value doesn't update while plugged in. Similarly, the % graph is presumably interpreted from the mV graph during this period (the mV figure seems to be the only one updated while plugged in).


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