a week of battery life (well almost)
 

My N9 just turned off, after 6 days and 4 hours off charger. Powersaving mode was on, no lpm, no double-tap to unlock (don't know if it affects battery life), I didn't connect to wifi or 3G, I did about 20-30 minutes of calls, about 10 sms, and otherwise used it normally. I didn't hesitate to unlock it to check the time, I used the alarms once or twice a day with the snooze function ringing at least twice.

In general, I used my N9 as a dumbphone. It is new, has very few contacts and messages and no music or videos for tracker or smartsearch to index.

I don't advocate of using the N9 in this way, I just wanted to test it versus a dumbphone assuming similar use (mostly to have an argument against people who favor dumbphones because their battery lasts a lot).

The result is that with the N9 you have the choice. If the battery life is critical once in a while you can manage.

Re: a week of battery life (well almost)
 

Well done! :)

Battery life on my crippled N900 is a day at most.

Re: a week of battery life (well almost)
 

I have drained 2 N900 batteries and got the 3rd to half in just over 7 hours :)

Re: a week of battery life (well almost)
 

I normally get a day or two out of the N9. With bunch of things running but without internet connection, i just turn it on when i need it. In general is ok but i wished it had more. Good to know that it can actually run several more days when needed.

Re: a week of battery life (well almost)
 

Very well put! I actually use my N9 as a semi-dumbphone during travel when I know I may be away from the wall charger for unknown periods.

I basically disable internet connection- connect it only when I am going to need it. Exit wazapp etc. I have LPM on with double tap to wake screen, and network is set to use 2G only.

This mode gives me about 2 days plus a few hours, with 30mins of calling approx and few google address lookups per day.

Re: a week of battery life (well almost)
 

Then I really need to order some Micro-USB ports and considering I don't have a credit card that's almost impossible.But almost.
Haven't ran NITDroid in 6 months now!
I'm now certain that I'm buying a second battery :)

Re: a week of battery life (well almost)
 

Doesn't 2G use more power than 3G on N9?

[edit] Well. I guess that depends of signal strenght. Initially I thought that power saving features with 3g might be more efficient. Anyway I have both most of time off as I only switch on internet connection when using the internet/updating feeds.

I have similar experiences to qwazix with the battery life, when used like a dumb phone. ca. 4-8days with one charge. With no use at all it clocks about 10 days. BME predicts 15days (ca. 3-4mA), but often something manages to bump up consumption a bit so I end up with 5-8mA idle consumption.

Re: a week of battery life (well almost)
 

rather then powering it off and on you may be better off putting it in Fly mode and power save.
starting up uses a tremendous amount of energy.
unless you are going to leave it OFF for days at end, of course...

Re: a week of battery life (well almost)
 

So what are the low-hanging fruit? Low-power mode and flight mode?

Much of the time my phone just sits there :)

Re: a week of battery life (well almost)
 

Qwazix clearly said... dumb phone
what do you get from a "dumb phone"???

• phone calls
• short messages
• address book
• calendar (sometimes)
• clock / alarm (dito)
• :eek:

nota bene: flight mode was only an alternative to powering off / on the device on a regular basis...
if you want to be able to get / make calls, GSM is probably your best choice (assuming no net access).

Re: a week of battery life (well almost)
 

I added a profilematic action - activate PSM when idle for 10+ mins. Makes it run for 2 days straight as a proper smartphone with medium usage.

Re: a week of battery life (well almost)
 

For reference my second N900 that I use as alarm clock has managed over 10 days with one charge. The phone is in offline mode all the time. It wakes me up every weekday morning.

Re: a week of battery life (well almost)
 

:confused::confused::confused:
We talking here about Nokia N9 ?

Re: a week of battery life (well almost)
 

Yes, I had the low power screen turned off as I mentioned.

Re: a week of battery life (well almost)
 

My latest battery usage profile said I went from 99percent to 35 percent in 1 day 16hrs and 14mins. Average idle for me was 13mA. I can usually get almost two days of life out of mine when I use it like I want. I'm always connected to wifi on a daily basis except for commuting. My brightness is all the way up, OC'd to 1200mhz, standby screen on with billboard, meecast updating every hour, and message screen mod to black. I do use it very little for internet because I'm almost always near a real computer, and I don't use it for e-mail. I average about 5 calls a day, and listen to some music at work as well. Battery life dramatically shortens to a little less than 24hrs when I text a lot though. Anyone think it would be a good Idea to use profilematic possibly to change frequencies/current draw depending on battery life and/or usage? Didn't know if it would be negligible or a waste of time. Just a thought though.

Re: a week of battery life (well almost)
 

6 days is really impressive!

Here it is Wednesday forenoon, my last charge was sunday afternoon and still 15h estimated usage time left.

My N9 is neither new nor empty, but also goes 3 days with "normal" usage. I just set up some rules in Profilematic:

0:00 - 7:00 all Day
PSM, LPS off, kill Wazapp

1:30- 6:00 Su - Th
Flightmode

Idle more than 2h
PSM, LPS off

and i disabled Smartsearch
Browsing, Email, Texting, Calling, Wazapp in a "moderate" rate, means, whenever i'm near a computer, i prefer to use it instead of the phone for Browsing and Email for Example.

Re: a week of battery life (well almost)
 

What about mail and calendar synchronisation in this case? Would this activate syncing (that did not take place due to PSM) as soon as you unlock the phone?

Re: a week of battery life (well almost)
 

Yes, when you disable PSM in the default rule.

Re: a week of battery life (well almost)
 

The phone's documentation says power saving mode entails the following:

• Mail and social network accounts syncing is disabled
• WLAN scanning frequency is reduced
• Internet connections are torn down when not in use
• Display brightness is reduced

All of those can be set individually - is there really no additional effect?

With flight mode it's much clearer what the implied effects are.

Re: a week of battery life (well almost)
 

The same thing was in Symbian phones. Power saving mode changed couple of things and all of these you could do yourself. I even made a little research with Nokia energy profiler, trying to prove tha PSM disables some system deamons or anything. But energy drain was simply the same as if I would manually disable the things PSM disables.

Re: a week of battery life (well almost)
 

Has anyone ever measured whether toggling WLAN scanning really has a significant effect? According to ajalkane, it's done only every 5 minutes.

Also, does the system keep a list of periodically scheduled tasks? I think there should be some cron-like daemon that takes care of starting the various syncs adhering to the user's settings. If so, can the list be inspected? D-Bus?

Re: a week of battery life (well almost)
 

This on an N900 but switching it to "never" increased my battery life from ~12 hours to ~48.

Re: a week of battery life (well almost)
 

Can't say much else than "holy sh*t" ;)

Re: a week of battery life (well almost)
 

Yes it has a significant effect. Because you won't get online automaticaly (in case of missing rescan) to the "Automaticaly used networks" if your connection is down. No active wifi = less battery consumption. But you should not have services in backgrounf that always need the connection (twitter, skype, auto mail sync...).

One week in rare use ist possible for me too.
N9, stock kernel PR1.3, profilematic and inception - of course ;-)

Re: a week of battery life (well almost)
 

I forgot to mention the said N9 is on PR1.0

Re: a week of battery life (well almost)
 

PSM also changes from 3G to GSM.. At least from what I experienced. But yeah, disabling WLAN scanning helps a lot.

Re: a week of battery life (well almost)
 

had the N9 in the "NOKIA" bag sitting in a corner for a few days as well as carrying it in my coat a couple times with 3G (when available).
run little over 4 days simply with a "empty" standby screen (i have it in its black leather pouch when not in use) and being online (mail, social sites & some Skyping)
after two days +/- i had 11 mAh in idle (& most of the time then, was the 1st time i used it in that charge :D)
missed to check power consumption before it went out, though :eek:

a couple charges back (was mostly at home & used WLAN automatically) it was down to 6 mAh idle but i didn't bother checking how long it run that way) used a Bluetooth keyboard as well, thus that probably burnt the battery down quite a bit

Re: a week of battery life (well almost)
 

Sometime after a flash idle power consumption rises, I have no idea what's causing this. At first avg idle is 5-6mA and after say a week or two it rises up to 12. I've got backup in backupmenu and usually I restore it every two weeks. This I think is the easiest way to keep avg idle power consumption as low as possible. Oh, forgot to mention, dual gsm mode, wifi sometimes left on, bluetooth is usually on.