N900 battery duration

Hi all,

after some days using the N900 (with already lot of charge/discharge
cicles) I'd like to compare my battery duration with other people.

At least for me, battery doesn't last so much... for example one day I
charged it at 10:30 and it lasted only until 18:30 without using GPS,
fotocamera, wifi, bluetooth, ecc.... just 20 minutes connected in
UMTS/HSDPA and the rest of the time keeping it in my pocket.

I don't have any particular application installed... I only use one
virtual desktop and the widget are: calendar, facebook, forecast.
Nothing more.

Another day the battery only lasted 6 hours... browsing a little more
(30 minutes in total).

Anyone else is experiencing the same problem?

p.s: today I'm not going to use it to connect to internet, just using
it as media player (I'm in the university library) listening it with
my headset. I'm playing mp3 songs since 1 hour and the battery is
still displayed as full. Not bad.

--
Andrea Grandi
email: a.grandi [AT] gmail [DOT] com
website: http://www.andreagrandi.it
PGP Key: http://www.andreagrandi.it/pgp_key.asc

On Fri, 16 Oct 2009 10:48:27 +0200
Andrea Grandi <a.grandi@gmail.com> wrote:

> Hi all,
>
> after some days using the N900 (with already lot of charge/discharge
> cicles) I'd like to compare my battery duration with other people.
>
> At least for me, battery doesn't last so much... for example one day I
> charged it at 10:30 and it lasted only until 18:30 without using GPS,
> fotocamera, wifi, bluetooth, ecc.... just 20 minutes connected in
> UMTS/HSDPA and the rest of the time keeping it in my pocket.
>
> I don't have any particular application installed... I only use one
> virtual desktop and the widget are: calendar, facebook, forecast.
> Nothing more.
>
> Another day the battery only lasted 6 hours... browsing a little more
> (30 minutes in total).
>
> Anyone else is experiencing the same problem?
>
> p.s: today I'm not going to use it to connect to internet, just using
> it as media player (I'm in the university library) listening it with
> my headset. I'm playing mp3 songs since 1 hour and the battery is
> still displayed as full. Not bad.
>

for me it lasts about 30hours. i don't use 3g/edge/.. just cellular
and some wifi. 2 vdesktops, same widgets as you but no facebook.

Dieter

Hallo!

Around 2, possible 2 1/2 days, with device beeing around 12 hours per day
in Wifi.
No special application running besides EMail program. A higher number of
EMail receives with
partial soundplayingand vibrating. Active SIM card but no traffic.

--
Gruß...
Tim

On Fri, Oct 16, 2009 at 10:48:27AM +0200, Andrea Grandi wrote:
> after some days using the N900 (with already lot of charge/discharge
> cicles) I'd like to compare my battery duration with other people.
>
> At least for me, battery doesn't last so much... for example one day I
> charged it at 10:30 and it lasted only until 18:30 without using GPS,
> fotocamera, wifi, bluetooth, ecc.... just 20 minutes connected in
> UMTS/HSDPA and the rest of the time keeping it in my pocket.

That sounds a bit low.

Not that I've seen longer life on mine, but I use mine a lot. A day or
two ago it survived from 8 AM to 2 PM while online using 3G (and later
WiFi), with almost constant web browsing, email checking, note taking
and GPS usage. I started charging it before I saw the 'low battery'
warning.

> I don't have any particular application installed... I only use one
> virtual desktop and the widget are: calendar, facebook, forecast.
> Nothing more.

Have you tried disabling facebook and forecast?

Have you tried running powertop in an xterm and looking at the output?

> Another day the battery only lasted 6 hours... browsing a little more
> (30 minutes in total).
>
> Anyone else is experiencing the same problem?

> p.s: today I'm not going to use it to connect to internet, just using
> it as media player (I'm in the university library) listening it with
> my headset. I'm playing mp3 songs since 1 hour and the battery is
> still displayed as full. Not bad.

Marius Gedminas
--
(mental note: stop installing red hat. everytime i do so, it takes ages to fix
my system again.)
-- from the sig of Martin Högman

Hi,

2009/10/16 Marius Gedminas <marius@pov.lt>:
> Not that I've seen longer life on mine, but I use mine a lot.  A day or
> two ago it survived from 8 AM to 2 PM while online using 3G (and later
> WiFi), with almost constant web browsing, email checking, note taking
> and GPS usage.  I started charging it before I saw the 'low battery'
> warning.

I wish I had the same duration :(

> Have you tried disabling facebook and forecast?

I can try, but... today, having them enabled, I'm listening to mp3
songs, only using media player and the battery is still full charge.

> Have you tried running powertop in an xterm and looking at the output?

command not found... do I have to install it?

--
Andrea Grandi
email: a.grandi [AT] gmail [DOT] com
website: http://www.andreagrandi.it
PGP Key: http://www.andreagrandi.it/pgp_key.asc

On Fri, Oct 16, 2009 at 10:02, Andrea Grandi <a.grandi@gmail.com> wrote:
>
>> Have you tried running powertop in an xterm and looking at the output?
>
> command not found... do I have to install it?

No, you have to be root.

--
Andrew Flegg -- mailto:andrew@bleb.org | http://www.bleb.org/

Hi,

2009/10/16 Andrew Flegg <andrew@bleb.org>:
> On Fri, Oct 16, 2009 at 10:02, Andrea Grandi <a.grandi@gmail.com> wrote:
>>
>>> Have you tried running powertop in an xterm and looking at the output?
>>
>> command not found... do I have to install it?
>
> No, you have to be root.

this is what I get:

# powertop
Powertop 1.13.3
status: Unknown job: pmtrackerdaemon
Mounting debugfs...FAILED

it doesn't sound good :P

--
Andrea Grandi
email: a.grandi [AT] gmail [DOT] com
website: http://www.andreagrandi.it
PGP Key: http://www.andreagrandi.it/pgp_key.asc

Hi,

Andrea Grandi wrote:
> At least for me, battery doesn't last so much... for example one day I
> charged it at 10:30 and it lasted only until 18:30 without using GPS,
> fotocamera, wifi, bluetooth, ecc.... just 20 minutes connected in
> UMTS/HSDPA and the rest of the time keeping it in my pocket.

My experience is that it lasts fine from plugging out the charger until
I get home in the evening around 20h or 21h. If I don't plug it in, I
tend to be out of battery around midday the following day.

That said, there have been days when it hasn't lasted a day, especially
with wifi on a lot, and when I've made several phone calls.

I had a problem with syncing my contact list (which I'll be reporting as
soon as I get time) which caused me issues during the week, so for the
time being I've moved back to my old phone for cellphone calls, but I
move to the N900 as often as I can in the office.

I installed quite a few apps from extras and etras-testing, but nothing
which is on all the time, except "sync for exchange" - and to reduce
battery usage there I've reduced sync frequency to once every 4 hours there.

Web browsing seems to be the major issue, especially on JS or Flash
heavy sites.

Cheers,
Dave.

--
maemo.org docsmaster
Email: dneary@maemo.org
Jabber: bolsh@jabber.org

On Friday 16 October 2009 10:48:27 Andrea Grandi wrote:
> after some days using the N900 (with already lot of charge/discharge
> cicles) I'd like to compare my battery duration with other people.

I get a little over a day, so if I forget to charge it at night, it's game
over somewhere early next day (have a spare battery or a microUSB source on
the ready if you're as forgetful as I am). Intensive web and OpenGL sucks it
dry real quick, but haven't yet measured it for exact numbers. I also suspect
having 5 IM accounts with ~700 contacts doesn't help either. Have not tried a
video marathon (yet). Wifi always on, GPS off, and I don't use GSM/3G data at
all (actually disabled 3G in the data options in hope of better battery
times). Completely different battery use-case than the N8x0, much more like a
phone (whereas my N810 used to last me 3-4 days).

PS. Somebody also made it possible to charge when battery completely dry (not
always possible on previous tablets :( ), thanks for that :)

Andrea Grandi wrote:
> # powertop
> Powertop 1.13.3
> status: Unknown job: pmtrackerdaemon
> Mounting debugfs...FAILED

I get the same.

Any idea what's that about?

--
Tuomas