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-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   Battery Life just got Amazing. 4 Days of Standby! (https://talk.maemo.org/showthread.php?t=58283)

s33 2010-07-14 05:45
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751113)
s3: Yup. I think the GPS + Sygic combo kills the battery pretty pretty fast, also I had the backlight enabled all the time. It's mostly got to do with CPU usage, when it's idling the CPU is usually near to 0%. Now, if we could get the CPU to just keep it's lower (maybe the 'titan' kernel).

To be honest, I don't understand the battery usage pattern of the 900 myself. I usually find it performs better once it drops a few percentage points. Like for example, it would drop from 95-85% pretty fast.

PS: Just discovered, the second smartreflex command (echo 1 > /sys/power/sr_vdd2_autocomp) does not work with PR 1.2, it still remains at 0, even if you enable it.
now that made sense:rolleyes:

noipv4 2010-07-14 05:53
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Can someone report if they have used this device ?

http://www.youtube.com/watch?v=XUnwI...layer_embedded

Looks like it's a nice little human powered charger.

s33 2010-07-14 05:56
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by Power (Post 751095)
s33 & JorgeFX: see from 20:00 hrs to 7:00 hrs, that's when it was on standby (with WiFi), on my desk, connected to wifi, no widgets with only Nokia Messaging on checking for mails, LED off.

The massive drop of 30-35% from 13:00 hrs to 19:00 hrs is when I was driving with sygic on, on a few calls, music playing and some camera stuff, and connected all the time via 2G (no autodisconnect). Remember, I am just talking idle time here, not usage time.

Oh and in the night I did wake up couple of time(s) to check :)

I don't have any custom kernel yet. So, that will be the next step.
do u think switching off the led will save battery to a good xtend?

cjp 2010-07-14 06:08
Re: Battery Life just got Amazing. 4 Days of Standby!
 
My greatest problem with batterylife comes from the way I use the device.

I might listen to internet radio ans browse the web at the same time, checking and writing e-mails all the while and this might go on for a couple of hours.

My best solution has too been to carry around an extra battery. I wan't to take everything out of my device!

Power 2010-07-14 06:15
Re: Battery Life just got Amazing. 4 Days of Standby!
 
s33: I think it makes a difference. How much, I don't know. I guess, it depends on how long that LED flashes, for example, in the night it will probably keep flashing through till morning, when I check the mail. Hmm, maybe a small python script to kill that LED after sometime could be a good idea, or maybe we can the LED pattern, I don't know!

pfontana77 2010-07-14 08:44
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by zimmerit (Post 750897)
Undervolting is definitely worth it to try.

I made few tests with that 3g, it really is not that good network standard what comes to energy efficiency. If the data connection is on but passive (no data moving) battery will run out in appr. 15-18 hours. If I use the phone as a bluetooth modem and download at maximum rate (44-48 kt/s) all the time batt wont last any longer than 4-5 hours:rolleyes:

At least it seems possible for you to improve from that 5-7 hours.
Well, yesterday night i've installed Titan's kernel with IDEAL configuration. I know that this configuration has range 500 - 850, but push very hard to the low voltage.

Late in the day i will post the image from Battery Grap for a comparison with the one that i've sent yesterday. Well see.

Another thing that i see is that the kernel configuration have two entry for SMART REFLEX, can i activate it directly from there?

Thanks.

zimmerit 2010-07-14 09:39
Re: Battery Life just got Amazing. 4 Days of Standby!
 
I dont know about that configuration, just wrote those few lines to terminal. VDD1 could be enabled without problem, but with VDD2 phone rebooted straight away so it had to be disabled.

What are those two things actually? Does anyone know?:D

pfontana77 2010-07-14 13:45
Re: Battery Life just got Amazing. 4 Days of Standby!
 
1 Attachment(s)
Well, i've just posted an image showing the comparison between standard kernel (left) and Titan's kernel with IDEAL setting (right)

A slightly improvement occured, but i think that lowering the minimum frequency to 250 and activating smart flex on VDD1 the result could be even better.

Tomorrow a new test will come.

slender 2010-07-14 13:50
Re: Battery Life just got Amazing. 4 Days of Standby!
 
@ pfontana77,
I do not know what you have posted to this to topic before but you probably realize that your device is not working as it should if that graph represents your device in idle state (screen off and programs closed)

No titans or any other kernel tweaking or actually any other tweak is going to make things better if your discharge is happening on that state.

JorgeFX 2010-07-14 14:08
Re: Battery Life just got Amazing. 4 Days of Standby!
 
Quote:
Originally Posted by pfontana77 (Post 751260)
Another thing that i see is that the kernel configuration have two entry for SMART REFLEX, can i activate it directly from there?

Thanks.
Yes, you can ativate those options from there;)


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