[maemo-users] N900 consumes too much power

[From: Pavel Řezníček]

Dne 6.8.2012 17:04, Paul Hartman napsal(a):
> On Sun, Aug 5, 2012 at 3:52 AM, Pavel Řezníček <cigydd at gmail.com> wrote:
>> Dear comaemoers,
>>
>> I have recently read an article, a review of Nokia N900. The reviewer stated
>> that his device lasts 3 days on battery when only sometimes calling or
>> writing SMS.
>> This is what I hardly can believe because my N900 lasts only 3, max. 6 hours
>> on battery and then the battery gets discharged.
>> Was the reviewer kidding or is something wrong with my mobile computer?
>> I have recently bought a new battery and the effect is minimal.
>> My device was in repair service already and they changed the motherboard. It
>> helped a bit but I never made it to that 3 days on battery.
>> Any ideas? :-)
> Using Scud battery + CSSU + kernel-power with smartreflex enabled,
> usually but not always connected to either 3.5G cellular internet or
> wifi, with email refresh every 15 minutes, no IM or voip accounts, no
> wifi autoconnect, brightness set to 2nd lowest setting, usually it
> will last me about a day and a half.
>
> If I'm listening to streaming music then battery dies much faster, a
> time measured in hours not in days.
>
> Some installed programs/widgets may be consuming CPU, daemons running
> in the background. HAM auto-update check can be a killer if you have a
> lot of repos enabled. If you are familiar with standard linux tools
> you can look in top and similar and find out what's running.
>
> BatteryGraph package is great, it will show when your battery usage is
> occurring, whether you are connected to gprs or wifi at the time.
> Maybe you can figure out if battery loss is constant or if there's a
> particular activity you did that is causing rapid drain.
>
> I also find that battery drain is affected by environmental
> conditions. If the N900 is in my pocket all day, or I'm in a place
> with poor signal, battery drains faster than if it is sitting on my
> desk with full bars.
>
> N900 in offline mode will last a week, but is not as fun. :)
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Thank you, Paul!

As I already announced on another place in this thread,

 1. I use BatteryGraph now a lot. I monitor the power consumption
    thoroughly.
 2. I have kernel-power-50 and CSSU installed.
 3. I'm going to enable smartreflex.
 4. I'm going to remove the calendar and location widgets from the
    desktop (even though I loved to have the calendar close to my eyes…).
 5. I started to use AutoDisconnect.
 6. I reduced the WiFi power from 100 mW to 10 mW.
 7. The biggest battery killer was hildon-input-method having corrupt
    autocompletion dictionaries. I asked here if we should raise a bug
    against this situation.

Pavel

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