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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)

hosico 2009-10-08 17:58
Re: N900 battery life
 
Some people want continuous on-line usage with im and skype etc.

I think for me it would be enough if the device could connect once in hour to check my e-mail. So what I mean, I don't even want to be connected 24/7. People will be pitying me if I would be all the time available at msn. ;)

kamakazikev24 2009-10-08 18:28
Re: N900 battery life
 
:D Am hearing you on that one! :D

Jack6428 2009-10-08 18:36
Re: N900 battery life
 
I think i will be fine, i mean...i use my device only during the day. When i go to sleep (usually midnight-9am), it's on, but idle, no tasks running, nothing, so it can "sleep" (btw, does the N900 support some kind of sleep mode?) and save energy. When I wake up, i charge it for 1 hour and then i go off somewhere, using the device from that point (10am - 10pm) - 12 active hours, doing random things - on daily basis: browsing, im, music, videos, games, calls, sms + when i need to: gps, pictures, fm, documents... That being said, i think i will be very happy.

zkyevolved 2009-10-08 19:13
Re: N900 battery life
 
Quote:
Originally Posted by hosico (Post 341975)
Some people want continuous on-line usage with im and skype etc.

I think for me it would be enough if the device could connect once in hour to check my e-mail. So what I mean, I don't even want to be connected 24/7. People will be pitying me if I would be all the time available at msn. ;)
I'm an active user :P I'm going to be using IM all day (with emails, but I"m debating if I want push email on the phone or just sync every 20 minutes or every 30. I don't know.). Music & IM :D

javispedro 2009-10-08 21:28
Re: N900 battery life
 
For the record, "being online all day" is hardly what I'd consider active use, and you can seriously expect a few days of battery life doing only that.

The kind of "active use" I mean is "calculating decimals of Pi", or playing fullscreen 3D games without sleep.

zkyevolved 2009-10-08 21:31
Re: N900 battery life
 
Quote:
Originally Posted by javispedro (Post 342116)
For the record, "being online all day" is hardly what I'd consider active use, and you can seriously expect a few days of battery life doing only that.

The kind of "active use" I mean is "calculating decimals of Pi", or playing fullscreen 3D games without sleep.
Are you serious? Lol. I've had SOOO many phones in the past 18 months, more than 12. And NONE of them have gotten close to a Blackberry, and with my blackberry bold with a 624 mhz processor can't get me more than 5-6 hours of ACTIVE use (without turning off teh screen) and it's a 2.6 inch screen, 1500 mah battery and a VERY efficient compression and radio transmission. with ALL my other phones I never got more than 8 hours on GPRS.

From what people say about the N900, they're getting 3-4 hours of the screen being on. I doubt with what you call "days" of online chatting will surpass more than 4-5 hours :P of continuous talking (on gprs)

javispedro 2009-10-08 21:36
Re: N900 battery life
 
Quote:
Originally Posted by zkyevolved (Post 342122)
Are you serious?
Yes. Instead of previous experience on other platforms, search for previous experience on Maemo: days using Wi-Fi and X-Chat.

Of course, you're not going to keep the screen nor the processor 24h on while "chatting". You do pauses, and that's were all those "power saving schmigangs" work.

zkyevolved 2009-10-11 12:17
Re: N900 battery life
 
Quote:
Originally Posted by javispedro (Post 342124)
Yes. Instead of previous experience on other platforms, search for previous experience on Maemo: days using Wi-Fi and X-Chat.

Of course, you're not going to keep the screen nor the processor 24h on while "chatting". You do pauses, and that's were all those "power saving schmigangs" work.
24 hours no, but for at least an hour at a time. I commute to work and school, and I have an hour each way, and not to mention dead time. I catch up on emails, instant messaging all while listening to music :P

Now that we have 300 more N900s out in the wild, how's the battery life :) from the summit people said that if you aren't using it, it doesn't drain very much. How about those that are going clickity click all day at the summit on the n900 :P? How's the battery life now with a near shipment n900.

Capt'n Corrupt 2009-10-11 16:21
Re: N900 battery life
 
No complaints probably is a good thing. :)

}:^)~

Laughingstok 2009-10-12 02:33
Re: N900 battery life
 
If the N900 ships with a car charger (one that plugs into a cigarette jack basically) then I'm all set as I'll just keep it in my Jeep and charge it like I currently do my n800

NZtechfreak 2009-10-12 02:44
Re: N900 battery life
 
I have some concerns about the battery life here too. My current phone is the i8910, which spec wise is very similar, but it has a 3.7 AMOLED screen (lower energy consumption) and a 1500mA battery. Even with a less power-consuming screen and better battery I have to curtail my use a little to get through a day.

A typical day is GPS tracking via sportstracker for around an hour as I cycle to and from work, about a 1-1.5hours streaming from lastfm, half hour browsing, an hour miscellaneous screen-on use (gaming/document viewing/GPS use/Fring etc/taking pictures or video/ watching video), continuous push email, and the usual telephony stuff.

As things stand I doubt the N900 will be up to my current usage, let alone improving things so that I don't need to cut back on browsing/gaming in order to get through a day...

somedude 2009-10-12 05:10
Re: N900 battery life
 
Here this guy says when unboxing his N900 its a 1500MAH but it clearly shows BL-5J. :confused:

Richrd 2009-10-12 06:04
Re: N900 battery life
 
Quote:
Originally Posted by somedude (Post 344160)
Here this guy says when unboxing his N900 its a 1500MAH but it clearly shows BL-5J. :confused:
The guy just said it by mistake. Its been talked about in the video comments.
If you look closely, you can see 1350mAh on the battery when he shows it to the camera.

GeneralAntilles 2009-10-12 06:05
Re: N900 battery life
 
Quote:
Originally Posted by somedude (Post 344160)
Here this guy says when unboxing his N900 its a 1500MAH but it clearly shows BL-5J. :confused:
Chippy was a little confused. ;)

NSchuyler 2009-10-12 08:00
Re: N900 battery life
 
I think that all I could want is two extra batteries (or one) and a charging dock for the two and the phone. Then if I don't think it'll last me the day, I'll bring a battery a long.

That plus a car charger = power almost anywhere and a spare for the worst case scenario :D

zkyevolved 2009-10-12 08:32
Re: N900 battery life
 
Quote:
Originally Posted by NSchuyler (Post 344225)
I think that all I could want is two extra batteries (or one) and a charging dock for the two and the phone. Then if I don't think it'll last me the day, I'll bring a battery a long.

That plus a car charger = power almost anywhere and a spare for the worst case scenario :D
I have a spare battery already ordered and an outlet charger for the battery. I will give the N900 a try. if I can't get through a FULL DAY of HARDCORE use with 2 batteries, then it's going back to Nokia. I can manage a day with normal usage, but I can't handle a day with very hardcore usage and 2 batteries. That's too much.

Saturday was the perfect example. I had lunch at my brothers house, leaving my phone off the plug at 8:30 AM (in GPRS mode, mind you), and after lunch I went to a friends house. After that I went to the movies with some other friends, and then I went out dancing... Arriving at home at 4:30 AM and 5% battery life on my blackberry. I'm a very hardcore user :) I don't expect to do that on the N900, because I know it won't. But I should be able to get at least 6-7 hours of hardcore use at a time.

RipTorn 2009-10-12 09:02
Re: N900 battery life
 
its got a USB charger on it, I can't say I go more than a few hours a day away from a ready and waiting USB port :p

koivjann 2009-10-12 09:10
Re: N900 battery life
 
About battery life:

I've used N900 proto now over one month.
The best time I have achieved is 36 and half hours with light use (2G on and wlan on about 5 hours). In normal business use the battery holds about 12-15 hours. Sometimes the battery drains in 4 hours and in that case the device is very warm. The same happened with E90 and E75. I guess it has something to do with 3G handshaking loop?

zkyevolved 2009-10-12 09:18
Re: N900 battery life
 
Quote:
Originally Posted by koivjann (Post 344259)
About battery life:

I've used N900 proto now over one month.
The best time I have achieved is 36 and half hours with light use (2G on and wlan on about 5 hours). In normal business use the battery holds about 12-15 hours. Sometimes the battery drains in 4 hours and in that case the device is very warm. The same happened with E90 and E75. I guess it has something to do with 3G handshaking loop?
it drains in 4 hours? Is that with 3G on or off? And during the 4 hours, what were you doing!? LOL!

In your honest & humble opinion, do you think the N900 has GOOD battery life :S? And what's in normal business use for you? :)

And congrats on the N900 prototype :) You're the envy of the majority of the people here.

twaelti 2009-10-12 09:46
Re: N900 battery life
 
Quote:
Originally Posted by Laughingstok (Post 344104)
If the N900 ships with a car charger (one that plugs into a cigarette jack basically) then I'm all set as I'll just keep it in my Jeep and charge it like I currently do my n800
It does not include a car charger out of the box, but:
- it includes an adapter to reuse existing nokia adapters.
- there are already various MicroUSB car adapters on the market

vvaz 2009-10-12 09:53
Re: N900 battery life
 
Yet another account of battery life:

http://www.valdyas.org/fading/index....9/10/11#maesum

Quote:
Worst thing: the battery goes flat after only eight hours of continuously running ssh to my home server, the media player, the (great> mauku identi.ca client, email checking, browsing and gaming -- and it can run only about six to seven apps at the same time before the music starts stuttering when when I connect it as a mass storage device to mhy laptop. Shame!
Note: author is disappointed but in fact those 8 hours are really good outcome from heavy usage!

Check source for photos from N900, in low light quality is really bad.

onutz 2009-10-12 10:27
Re: N900 battery life
 
7-8 hours is great in modem and multimedia high usage profile. 3-4 hours, as it seemed in early days, is not...

Here is why:
http://utestme.com/2009/09/12/nokia-n900-battery-life/

zkyevolved 2009-10-12 10:39
Re: N900 battery life
 
Well, if we can get 7-8 hours of HEAVY usage. (i'm not exactly how sure nor how damanding SSH program is). But one thing that surprised me was that his music was hopping frames with only 6 apps open :s. That's kind of frightening.

ysss 2009-10-12 10:46
Re: N900 battery life
 
These cortex A8 devices have extremely wide range of power consumption rate. It's normal to drain all the battery in 4-5 hours while they can last 1-2 weeks in complete idle state.

Be glad that the N900 has an open platform\architecture\license\etc so that we'll have all the tools and transparency needed to optimize the system to eek out every last drop of its performance.

qgil 2009-10-12 11:08
Re: N900 battery life
 
Quote:
Originally Posted by zkyevolved (Post 344322)
Well, if we can get 7-8 hours of HEAVY usage. (i'm not exactly how sure nor how damanding SSH program is). But one thing that surprised me was that his music was hopping frames with only 6 apps open :s. That's kind of frightening.
What he says is

Quote:
it can run only about six to seven apps at the same time before the music starts stuttering when when I connect it as a mass storage device to mhy laptop.
If you go to mass storage the music will stop playing no matter how many apps are open, since both the eMMC and the MicroSD are now in the hands of your laptop.

bugelrex 2009-10-12 12:36
Re: N900 battery life
 
Quote:
Originally Posted by ysss (Post 344323)
These cortex A8 devices have extremely wide range of power consumption rate. It's normal to drain all the battery in 4-5 hours while they can last 1-2 weeks in complete idle state.

Be glad that the N900 has an open platform\architecture\license\etc so that we'll have all the tools and transparency needed to optimize the system to eek out every last drop of its performance.
I think its best to judge the battery on a relative basis. Eg how does it compare with the E71 with similar usage. I would be satisfied if it lasts just half as long as the e71.

If its much less than that then...... mmmmm

icebox 2009-10-12 12:53
Re: N900 battery life
 
Quote:
Originally Posted by janzeeschuimers (Post 336691)
But there is one thing more to tell about the battery of the n900 , it is only a Li-Ion battery against the much better Li-Polymer of the N810.
When compared to a lithium-ion battery, a Li-poly has a greater life cycle , and lower weight and greatly increased run times.

Nokia gives the N900 not only less battery-power , from 1500mAh to "only" 1320 mAh but also a worse battery-technologie from Li-Polymer to Li-Ion.
I'm afraid you are a bit wrong. The main advantage of Li-Polymer is the posibility of the battery taking non-standard shapes.

Wikipedia says:
The advantages of Li-poly over the lithium-ion design include lower cost manufacturing and being more robust to physical damage. Lithium-ion polymer batteries started appearing in consumer electronics around 1996.

icebox 2009-10-12 12:54
Re: N900 battery life
 
Quote:
Originally Posted by qgil (Post 328692)
No, I'm not saying it. Not many sales devices in this category would resist this intensive use in one go. About the N900 you will find yourselves after opening the sales box. In any case you know that Nokia has high standards in power management.
Yes I know, my e71 is one of the few devices that stands up to the task and I know nokia know their way around with power. Still they managed to fit the bp-4l inside the e55 and e52 although both are thin, light, feature packed phones.

Seriously, by the number of hardware features, I hoped the n900 would have a bp-4l and another, smaller one like the BP-6M, both hot swappable :D But that's just me.

dansus 2009-10-14 05:18
Re: N900 battery life
 
Looks like those that received the freebees at Maemo Summit are reporting on Twitter very good battery life for the N900.


Quote:
It died after 8 hrs of heavy use. And I mean real heavy. All the time
connected to home WLAN, intensive net browsing, downloads, video streaming,
video playback, music playback, running multiple apps, etc;

dansus 2009-10-14 05:18
Re: N900 battery life
 
Looks like those that received the freebees at Maemo Summit are reporting on Twitter very good battery life for the N900.


Quote:
It died after 8 hrs of heavy use. And I mean real heavy. All the time
connected to home WLAN, intensive net browsing, downloads, video streaming,
video playback, music playback, running multiple apps, etc;

RevdKathy 2009-10-14 07:13
Re: N900 battery life
 
Double post if you want but I'm only going to thankyou once!

Glad to hear this, though. There's some alarmist stuff out there.

icebox 2009-10-14 10:45
Re: N900 battery life
 
Somebody's hours are other people's days...

I think that there should be a software written, to be run on your current device, leave it for a few days to record your usage pattern and then estimate how much the new X device would last...

onutz 2009-10-15 11:52
Re: N900 battery life
 
Quote:
Originally Posted by dansus (Post 345987)
Looks like those that received the freebees at Maemo Summit are reporting on Twitter very good battery life for the N900.
Well... Yes and No. WLan is the most economic way for connecting; the battery drains 4-5 times quicker if you use mobile internet instead of WLan. For example, HTC Hero lasts 40 hours in WLan environment and only 4-5 hours on a mobile internet connection (good coverage). E71 has far better battery life, but the difference between battery life using wlan only and mobile internet only is the same.

ruskie 2009-10-15 12:40
Re: N900 battery life
 
Quote:
I think that there should be a software written, to be run on your current device, leave it for a few days to record your usage pattern and then estimate how much the new X device would last...
Yes that would be great.

Quote:
Well... Yes and No. WLan is the most economic way for connecting; the battery drains 4-5 times quicker if you use mobile internet instead of WLan. For example, HTC Hero lasts 40 hours in WLan environment and only 4-5 hours on a mobile internet connection (good coverage). E71 has far better battery life, but the difference between battery life using wlan only and mobile internet only is the same.
That's why I would consider the MiFi with a 24h+ powerpack a great idea :)

NvyUs 2009-10-15 14:48
Re: N900 battery life
 
MickyFin just posted on twitter this
"Been out in the real world with the N900 today, took some sample videos, inc macro, gps usage interesting, battery half depleated in 9 hours"
so battery is no concern to me as it seems to have improved a lot since early reports and its still not final software yet
http://twitter.com/MickyFin/status/4889763758

bugelrex 2009-10-15 15:16
Re: N900 battery life
 
Quote:
Originally Posted by NvyUs (Post 347259)
MickyFin just posted on twitter this
"Been out in the real world with the N900 today, took some sample videos, inc macro, gps usage interesting, battery half depleated in 9 hours"
so battery is no concern to me as it seems to have improved a lot since early reports and its still not final software yet
http://twitter.com/MickyFin/status/4889763758

Pity we don't know if his real world means connected to wifi or 3G-data. If its no wifi and not edge then yes its pretty acceptable. But also it assumes the battery indicator is a true percentage where the last few bars last as long as the first few bars.

NvyUs 2009-10-15 15:43
Re: N900 battery life
 
Quote:
Originally Posted by bugelrex (Post 347290)
Pity we don't know if his real world means connected to wifi or 3G-data. If its no wifi and not edge then yes its pretty acceptable. But also it assumes the battery indicator is a true percentage where the last few bars last as long as the first few bars.
well hes in finland where 3G is good and been away from home all day from what i gather from other tweets, so i presume, 3G usage

shadowjk 2009-10-15 16:12
Re: N900 battery life
 
If it's like on N800, N810 and E75, in my experience the first top bar is 50 percent of battery, or when the meter thinks there's 50 percent left.

R-R 2009-10-15 16:27
Re: N900 battery life
 
Talking about battery, what should be a good / cheap place to buy _real_ BL-5J batteries?
eBay seems to be full of Chinese garbage...

bugelrex 2009-10-16 16:47
Re: N900 battery life
 
Theres a nice thread going on the community forum which gives real life usage of battery:

http://maemo.org/community/maemo-use...tery_duration/


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