Re: Fix battery time from under 7 hours to over 9 days!
 

i havent used wifi since i got my device, about 2 weeks now and on moderate use, (some browsing, few calls, moderate text..etc) it lasts about 8-10 hrs.. on idle it lasts more.

Re: Fix battery time from under 7 hours to over 9 days!
 

You might have some widgets that eat quite a lot of CPU. Check general battery lifetime improvement tips from here:
http://talk.maemo.org/showthread.php?t=35907

Re: Fix battery time from under 7 hours to over 9 days!
 

Just repeat the mantra that people have been saying...

"3G is a power killer"

It's eats thru your power more than 3x faster compared to EDGE/GPRS/WIFI.

Re: Fix battery time from under 7 hours to over 9 days!
 

It is a bit like a double edged sword... Many older 3G devices eat power like hell just being on 3G without any active data connection etc. Just the normal being able to receive calls.

However, there is a very significant power saving in N900 there than on my old Nokia E70 for example. Not sure how well other modern 3G phones do than N900 though. N900 can handle 9.1 days of idle on 3G and 3.1 days of idle with 3G data connection on but idle.

It is true that data transfer on 3G eats power like there is no tomorrow. I suppose the worst efficiency on 3G is when there is some data going constantly but the amount of data is very small.

On other hand, while browsing for example, the time it takes to load a page on 3G is so much faster than on 2G that you might actually save power. Eg. 2 Mbps 3G and 0.2 Mbps 2G gives you 10 times the download time for a given page (assuming the server you download from is fast enough) on 2G. So, 10 times longer of moderate battery usage compares to short heavy battery usage. It would take more experimenting to know how it goes. And signal quality etc will matter of course.


Good old memories with E70 and 3G... When I had some problems with my normal connection, I used E70 as internet connection for my main comp and played Spring (open Total Annihilation remake sort of).. The transfer speed was low, but it was constantly transferring data on both directions, so I once even noticed the the charger was too slow to charge the phone so the battery died while being charged!

Re: Fix battery time from under 7 hours to over 9 days!
 

Hi, either all this information is misguided or 90% of n900 users have faulty units other than the wifi. I have had the 7 hour problem, since I have now tested it by doing the following-
uninstalled all apps
removed all widgets
deleted one desktop
disabled gps totally
not even tried to active any internet since switch on (so no wifi at all)
enabled gsm only, so 2g only
after this i have sent 40 sms, made one 15 minute call an thats all i did, it was totally idle an it still only lasted 16 hours, this is totally unacceptable (oh an have brand new sim card) and I want some-one to personally prove to me they are getting more than this cause i dont believe a word of it, that or like i said the majority are having problems so nokia have really screwed up an will receive alot comin back!!!! cause mine will be.

If I've offended anyone I apologise but after all the fuss of waiting three months for it I'm beside myself with it now that i dont believe that i have a device that it ment to be perminant 3g, perm gps an perm internet connection an theres just no chance at all less ye dont want a portable device ye just want a wire sticking out of it plaugged in all the time, whats the point?!?!?!?

Re: Fix battery time from under 7 hours to over 9 days!
 

About the WiFi bug, I rmmod/modprobe the WiFi drivers on Linux when the drivers crash, cant we do this on Maemo?

Re: Fix battery time from under 7 hours to over 9 days!
 

I have heard that some people have some problem with calendar widget using lots of battery. And some IM widgets also use much.

I myself have phone set to dual mode (stays on 3G at all times here), have bunch of widgets (calendar, media player, foreca weather and location) etc... GPS and GSM network location are enabled, but nothing should use those other than when I manually activate location widget or use some other program using location info. I do not have any IM widgets or anything that checks stuff from the net periodically. Foreca weather widget is set to update manually only (whenever data connection starts or I manually refresh it). I don't have much stuff on calendar though.

Anyway, other than the Wi-Fi bug, I do not experience any problems with battery life.

Re: Fix battery time from under 7 hours to over 9 days!
 

how long does your battery last????

Re: Fix battery time from under 7 hours to over 9 days!
 

now been attached to the company wifi for eight hours, and the battery is still somewhere around 65%.

Re: Fix battery time from under 7 hours to over 9 days!
 

Yes, this seems to be the least efficient way to make use of the 3G 'race to idle' concept.

Yes, that's the right concept but unless 90% of your browsing activities are task oriented then most people will 'spend' the time savings anyway ("Oh, I have 15 minutes to kill while waiting for my appointment"). So in the same amount of time you'll drain the battery more as you plow thru more pages. Yes, you get more data-per-mAH spent, but you'll end up spending more power anyway unless you consciously control the power spending.