[Galaxy S I9000 General] bokbacken:
lpy's measurement - a summary

This is a summary of lpy's measurements for our referens, our thanks go to hime for this great work.

Comparison of ext4 and rfs

Ok not sure if I'd call this inconclusive or if people are happy enough with these results to label the EXT4 excess battery usage a "myth" just yet (it really is hard to tell, especially if the results would vary from tests vs real life usage), as I'd probably need some sort of test app to do these properly. Plus it's 5am here.. Anyway, these are my results (running JPY 2.2.1):

[EXT4] & [RFS]

Quadrant Advanced -

1/4 File system writes = N/A (too quick)

2/4 File system reads = N/A (too quick)

3/4 Database writes = 220-230mA

4/4 Database reads = 320-330mA

Copying 48MB file from -

Internal SD card to /data = 190-230mA (Write test?)

/data to internal SD card= 190-230mA (Read test?)

/data to /data = 190-230mA (Read/Write test?)

The Benchmark app which tests creating 1000 files, deleting 1000 files, etc... showed

[EXT4]

using up to 330mA,

[RFS]

up to 260mA.

However, the EXT4 test finished a lot quicker.

Idle (no file transfer) -

~100mA

Different current draws see the JPY wifi it does draw a lot more:

So how much current exactly does stuff use?

2.2 JP5 AU & 2.2.1 JPY Firmware

Phone off: 0mA

Screen off, Idle: 1-3mA

Screen off, Idle, 3G on (full signal): 2-4mA

Screen off, Idle, Wifi on: 3-7mA

Screen off, Idle, Wifi on: 25-250mA (JPY firmware with weak Wifi signal)

2.2 JP5 AU Firmware

TWLauncher, default background, no icons, minimum brightness: 93mA

TWLauncher, Aurora animated bg, no icons, minimum brightness: 158mA

TWLauncher, default background, no icons, maximum brightness: 205mA

TWLauncher, Aurora animated bg, no icons, maximum brightness: 228mA

And to my question about Brightness by Curvefish this was the result with a great tip of another app to lower the brightness: Screen Filter by haxor industry

It helps a little, but a bigger help is the Screen Filter app - unless you're in the sun :-)

Dark background -

100% - >112mA

50% - >97mA

0% - >80mA

-8% - >78mA (CurveFish Brightness)

-8% + Screen Filter @ 20% - >71mA

Bright background -

100% - >383mA

50% - >243mA

0% - >109mA

-8% - >100mA (CurveFish Brightness)

-8% + Screen Filter @ 20% - >71mA

Bonus test

Vibration test (*#0842#): mA vibration on - mA vibration off =

Vibrate full = 65mA

Vibrate just over half = 25mA

Vibrate just under half = 10mA

Vibrate low = 7mA

As you can see, setting vibrate to half (or just under) can save quite a bit of power too.

TLDR lpy's quick tips:

Screen Filter app for night time/indoors

Set vibrate to just under half or less

Earlier measurements:

My own test results:

K10I 256HZ (default color), Tweaks on, ALL EXT4 -

Phone off: 0mA

Screen off, Idle: 1mA-3mA (very nice)

Screen off, Idle, 3G On: 2mA-4mA

Screen off, Idle, Wifi On: 4mA-7mA

ADW Launcher, blank screen, dark wallpaper: 86mA

ADW Launcher, blank screen, animated Aurora wallpaper: 178mA

ADW Launcher, blank screen, Froyo default wallpaper (building pic): 123mA

Winamp app playing mp3 (screen off): 52mA-60mA

Winamp app playing mp3 (screen on, minimum): 120mA-130mA

GPS Test app (GPS off): 150mA-160mA

GPS Test app (GPS on): 200mA-285mA

White screen (minimum brightness): ~130mA

White screen (maximum brightness): ~600mA

SetCPU app 100% CPU stress test (screen on, minimum): ~295mA

Camcorder standby black: ~320mA

Camcorder recording black: ~410mA

TuneIn Radio app (stream), A Online Radio app (stream), Winamp app (mp3), screen off: 166mA-200mA

J Benchmark 2 app (Disc Benchmark): 400mA-500mA

K10I 500HZ (default color) -

Exactly the same mA as 256HZ.

I will put a link to in post #3

@lpy: If you like me to add any info here please send a PM