[HTC EVO 3D] chw9999:
Batteries included

Regarding battery usage and all the claims about the kernel sucking blood... here are my results.

Preface:

·	I do have System Tuner installed (today new version available!). Interactive, 1.51GHz, -50mV, Screen Off Gov. Conservative /w max 432MHz.

·	I use ponury slide2wake.

·	I am using V6 Supercharger U9RC8.2, Nitro lag Nullifier, BulletProof (GO) Laucher. Don’t know if all of that actually does something, but it has a nice ring to the name ;)

·	Since about a week I use Juice Defender Ultimate; I am little disappointed, because it doesn’t generate electricity to drive my phone, but happy to share my settings.

·	I do have a lot of background apps running (check here). During night time I switch off my Wifi router, JD then shuts off Wifi on the phone for me (I’m a lazy guy ;))

·	Somehow I did not use Wifi at all during the day (hey, we had a spring day, was outside pushing a baby buggy :))

·	I used Badass Battery Monitor for some of the screenshots.

·	I don’t use the common “socializing” apps, if your battery drains, you might want to check there...

·	These are the services/apps I am finding running at my system right now...

AdFree

AlarmDroid

Android Photo Widget

Background Picture

Badass Battery Monitor

BahnAlarm

Better Sleep

Business calendar

CPU Usage Montor

Clipboard Contents

DB Navigator

Folder Organizer

GO Launcher EX

GO Launcher Ex Notification

Gesture Search

K9 Mail

Missed Call Volume Control

Missed Message Flasher

MultiTasking Pro

Multicon

MyPhoneExplorer Client

Perfect Keyboard Pro

Rain-Alarm Plus

Smart Statusbar

Status

Status Bar 2G-3G Lite

System tuner Pro

Usage Timelines Free

Volume+

WDM-Weather

Weather

Webcam Widget

Widgetsoid

·	...and some other apps which connect every now and then...

The Test:

·	Flashed last night the "new" 5.4 w/ fastcharge kernel, cache and dalvik cleaned, fixed permissions. Used "Battery Calibration" app and calibrated at full charge exactly at midnight to 100% (timing is everything ;))

·	Showed 4,344 mV.

·	Got my hands onto the phone nine hours later... As expected it was sleeping most of the time all right, and had used 18% of juice available – that makes 2% an hour (use a pocket calculator if you don’ trust me). That is not nothing, but then again, I use quite some apps in the background.

·	See for yourself what was busy in the view minutes awake time... Mind that “45,1% of battery consumed” means 45% of 18% of the whole charge! That makes it approx. 9% for the software, the rest goes into a bright flash of short screen usage...

At around 7 pm I got another look at the charge. Not too much done in the meantime (at the phone, that is). Now 45% of the battery charge was used, 37% of battery usage consumed by the apps listed... (again: 37% of 45% = 17%). Radio suckled at the batt as quite as well, though I didn’t do a call all day, and – of course – the screen. The kernel ist quite harmless in comparison.

·	As one can see, the phone was busy intermittently the whole time... seems my background apps are working overtime ;)

·	That’s what I would not call a “heavy user” today ;)

I found that switching on and off the screen makes a dramatic difference, as I saw later... within a minute battery dropped 4%... I had some trouble getting the screenshots and shut off the screen a couple of times instead of screenshooting... Apparently something the sucks battery at screen start up!

Conclusion: Doing nothing on the phone seems to be the best to conserve energy (ha!). If you are doing something, keep it running. Reduce brightness. YMMV.

Cheers

Christoph