maemo.org - Talk
Page 52 of 72 « First 425051 52 535462 Last »
Show 40 post(s) from this thread on one page

maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   N900 battery life questions, issues, scenarios (https://talk.maemo.org/showthread.php?t=31020)

woodyear99 2010-01-27 15:21
Re: N900 battery life questions, issues, scenarios
 
Yes but do u leave ur 2G gprs connected all the time?

llacii 2010-01-27 15:23
Re: N900 battery life questions, issues, scenarios
 
Quote:
Originally Posted by whidalgow (Post 497538)
Updating, 42 hours since last full charge, yesterday i saw 20 min of video on speakers, listened music around 30 min, web surfing 30min, phone calls, (15min), 15 sms, upload video in facebook in 10 min and shared files by bluetooth (15mb) and my battery shows little less than 50% !!!
What about email, do you have it checking at a regular interval? Or are you in a "disconnected" state most of the day?

woodyear99 2010-01-27 15:25
Re: N900 battery life questions, issues, scenarios
 
I could get similar results IF I do not leave internet connected, 2G or Wifi...but when I stay connected battery seems to drain faster than ur results. Lucky u :)

whidalgow 2010-01-27 15:25
Re: N900 battery life questions, issues, scenarios
 
Quote:
Originally Posted by woodyear99 (Post 497590)
Yes but do u leave ur 2G gprs connected all the time?
Yes, is connected all the time :)

bugelrex 2010-01-27 15:30
Re: N900 battery life questions, issues, scenarios
 
Quote:
Originally Posted by whidalgow (Post 497602)
Yes, is connected all the time :)
Which program do you have connected all the time? is it only the IM accounts? (only built in gtalk, skype)

luqman 2010-01-27 15:55
Re: N900 battery life questions, issues, scenarios
 
hello again,
so I think I resolved my n900 battery problem. Here is the summary
1) I noticed battery would run out very quickly (<8hrs) when I had 3g turned on.
2) I tried disconnecting from Internet and use it just as a phone. Battery life was superb..2-3 days and battery was still above 50%
3) Obviously, n900 is not supposed to be used just as a phone, so I installed tcpdump(packet capture utility) on my phone. Yesterday i turned on 3g again and my running programs were skype, googletalk, SIP phone , gmail, exchange mail, omweather. I don't think i have anything else. The battery ran out as usual in 8 hrs.
I examined all packets transferred yesterday with the help of tcpdump (exported to wireshark on my pc) and found out that skype & gtalk were very chatty programs. They were constantly sending out packets which meant that 3g was in constant use. Until today I had assumed that simly keeping the Internet connection turned on via 3g was the reason for battery running out.
4) Today I have 3g connected full time but I shutdown skype & gtalk, its been nearly 8 hrs and battery level is 75%. note: the battery indicator is still nearly at 90% but we now know thats not true...

conclusion:::
BATTERY DOESNOT RUN OUT BECAUSE 3G OR 2G IS TURNED ON, BUT BECAUSE PROGRAMS LIKE SKYPE AND GTALK USE IT CONTINOUSLY TO SEND OUT KEEPALIVE MESSAGES...NOTE: I DIDNT USE SKYPE OR GTALK YESTERDAY, THE PACKETS I SAW WERE JUST CONSTANT KEEPALIVE MESSAGE...CONTINOUSLY EATING MY BATTERY JUST TO TELL GTALK AND SKYPE THAT IM ONLINE
5) next steps. now I need to find out how to shut up skype & gtalk while still remaining online. the skype protocol has been configured so, I believe, to get around firewalls, which is basically why many service providers find it hard to block skype.

bugelrex 2010-01-27 16:16
Re: N900 battery life questions, issues, scenarios
 
Quote:
Originally Posted by luqman (Post 497657)
hello again,
so I think I resolved my n900 battery problem. Here is the summary
1) I noticed battery would run out very quickly (<8hrs) when I had 3g turned on.
2) I tried disconnecting from Internet and use it just as a phone. Battery life was superb..2-3 days and battery was still above 50%
3) Obviously, n900 is not supposed to be used just as a phone, so I installed tcpdump(packet capture utility) on my phone. Yesterday i turned on 3g again and my running programs were skype, googletalk, SIP phone , gmail, exchange mail, omweather. I don't think i have anything else. The battery ran out as usual in 8 hrs.
I examined all packets transferred yesterday with the help of tcpdump (exported to wireshark on my pc) and found out that skype & gtalk were very chatty programs. They were constantly sending out packets which meant that 3g was in constant use. Until today I had assumed that simly keeping the Internet connection turned on via 3g was the reason for battery running out.
4) Today I have 3g connected full time but I shutdown skype & gtalk, its been nearly 8 hrs and battery level is 75%. note: the battery indicator is still nearly at 90% but we now know thats not true...

conclusion:::
BATTERY DOESNOT RUN OUT BECAUSE 3G OR 2G IS TURNED ON, BUT BECAUSE PROGRAMS LIKE SKYPE AND GTALK USE IT CONTINOUSLY TO SEND OUT KEEPALIVE MESSAGES...NOTE: I DIDNT USE SKYPE OR GTALK YESTERDAY, THE PACKETS I SAW WERE JUST CONSTANT KEEPALIVE MESSAGE...CONTINOUSLY EATING MY BATTERY JUST TO TELL GTALK AND SKYPE THAT IM ONLINE
5) next steps. now I need to find out how to shut up skype & gtalk while still remaining online. the skype protocol has been configured so, I believe, to get around firewalls, which is basically why many service providers find it hard to block skype.

Would be interesting to see if it's Nokia's implementation of skype+gtalk clients that is the issue. I.e Fring on s60 is known to be VERY battery conservative, unfortunately Fring on n900 may not be stable enough to test how well it manages battery

Also, I wonder if there is any configuration to reduce the number of data packets used for IM. If you halve the packets, maybe you wait 3 seconds v.s 1.5 secs for an IM response.. no big deal. Especially to reduce when no active conversations in place...

filed bug: https://bugs.maemo.org/show_bug.cgi?id=8581
Hope Nokia consider this change

liedekef 2010-01-27 16:26
Re: N900 battery life questions, issues, scenarios
 
To add a bit to the confusion, I found out that the percentage reported by lshal sometimes goes up again! I'm using the desktop command execution widget to see my battery percentage and at a cetrain moment it was 18%. Then I refreshed half an hour later or so and it was at 25%! Again 2 hours later of almost no usage at all, it went down to 20%.
So maybe the kernel battery measurement is a bit off?
On the other hand, my battery life is great. I get 4 days out of it, while being wireless online from time to time (30 minutes by day tops), only 2G and wireless switched off when not used.

Franky

hece35 2010-01-27 20:31
Re: N900 battery life questions, issues, scenarios
 
Quote:
Originally Posted by hece35 (Post 496020)
Some measurementes. I have BT always on and hidden although during these tests, it wasn't connected. Latest FW. Only widget using internet automatically is OMWeather, which updates itself when connected every 4 hours. I log the current mAh capacity reported by 'hal-device bme' every 10 mins. When the device is in standby, the value does not change but it does not matter, since as soon as I unlock it, it is updated. I've measured these standby currents during the night (6-8h) when I did not move the phone or do anything with it.

WiFi connected: 15 mA -> ~80 h
3G connected: 20 mA -> ~60 h
3G + skype connected: 80 mA -> ~16 h
3G + MSN (Haze) connected: 120 mA -> ~10 h
3G + MSN/ICQ over Jabber: 30 mA -> ~ 40h.

That's more like it, by using jabber to connect to MSN & ICQ I get 4 times the battery lifetime compared to MSN-Haze plugin :) Very nice.

Quote:
Originally Posted by luqman (Post 497657)
conclusion:::
BATTERY DOESNOT RUN OUT BECAUSE 3G OR 2G IS TURNED ON, BUT BECAUSE PROGRAMS LIKE SKYPE AND GTALK USE IT CONTINOUSLY TO SEND OUT KEEPALIVE MESSAGES.
That's right, my data supports this too. I have yet to analyze jabber but a friend did analyze some desktop version which only sent 1 packet per minute.

cenwesi 2010-01-27 20:33
Re: N900 battery life questions, issues, scenarios
 
is there a way to fix this rather than us waiting for Nokia to fix it. i would really like to have gtalk on all the time but leaving it on will shorten the battery life.


All times are GMT. The time now is 16:34.
Page 52 of 72 « First 425051 52 535462 Last »
Show 40 post(s) from this thread on one page

vBulletin® Version 3.8.8