Battery drain with new update

[alfandroidcat]

After applying the change below, offered by Samsung support and posted by Tarnlight (from a post by dapheel), my battery run time on 2.3.6 now seems to be about what it was on 2.3.4.

1. Settings
2. Wireless and Network
3. Wifi Settings
4. Click Menu Button (next to Home Button) and Select Advanced
5. Select Wi-Fi sleep policy
6. Change it from "Never" to either "Never when plugged in" or "When Screen turns off".

I chose "When Screen Turns Off".

Since this worked, I decided to allow 2.3.6 to be pushed to my wife's identical phone, after which I applied the same work around to her phone. After several days of testing, both phones now seem to have normal run time (2-3 days when used only occasionally). Even with moderate use, well over a 24 hour day's operation is attainable.

I still don't like the blue fog added in 2.3.6, especially in the browser, that occurs at the screen edge limits. There is really no need for this, in spite of Samsung having to dump the Apple challenged bounce effect. It occurs even on the mobile versions of web sites where there is no data behond the edges anyway.

[Rytherix]

Just an update from before. I have disabled any wifi using applications, turned the sleep policy to "screen is off" and fully charged the device.
After 3 hours I am down to 86% which is a good 5% an hour with NO usage on airplane mode with just wifi on. The battery monitor shows that Android OS has taken up 80% of that battery usage, and the phone has been awake for very small intermittent periods.

This is with the same Unnamed running 2.3.4 as I posted earlier.
I am so sad, some please help me
Any suggestions?

[Strawdawg]

I did not see much, if any, difference between 2.3.4 and 2.3.6.

My phone always dropped about 2.5% to 3.5% an hour when idle. After reading the explanations about wi-fi in the new release, it dawned on me that my phone was seeing my wifi network at least 12 hours a day most days. I charge every night.

I changed the settings to relfect those suggested by Samsung so that wifi was off when the screen was off. It lost 5% in the last four hours-screen was off the entire time. A bit more time will tell if this is the new norm, or not, but it would seem this is a big improvement.

My old 3GS was also on wifi most of the time and it used battery at a comparable rate-if not worse.

As suggested above, I would guess something else is going on with your phone other than what others have been seeing.

[melder52]

My GSII just updated to 2.3.6 last night unfortunately. Battery drain this morning was horrible. I've just done the change to WiFi settings for screen off to see if it helps. I'm on WiFi 90% of the time minimum so it's crazy that this update can't handle that when 2.3.4 was fine. I don't have the energy to argue with AT&T reps about this update

[Onanda]

Originally Posted by melder52

My GSII just updated to 2.3.6 last night unfortunately. Battery drain this morning was horrible. I've just done the change to WiFi settings for screen off to see if it helps. I'm on WiFi 90% of the time minimum so it's crazy that this update can't handle that when 2.3.4 was fine. I don't have the energy to argue with AT&T reps about this update

I was in the same situation. But my phone syncs with Exchange email/Outlook constantly and turning WiFi to sleep make it use the cell signal, using more battery. I used the 'unroot' instructions to get back to 2.3.4 and I'm back to 3-4 days between charging. I only use it for calls, email and occasional GPS/traffic. I have no other apps installed.

[melder52]

Hard to tell if the "screen off" tweak works or not because it keeps reverting to Never. Very strange but I set it and then leave the phone for a bit .. Turn it on and it's off WiFi .. It reconnects to my WiFi and I go back into the setting and it's reverted back to Never ..

Guess I may look at the "unroot" to get to 2.3.4 ..

[tneil]

Originally Posted by melder52

Hard to tell if the "screen off" tweak works or not because it keeps reverting to Never. Very strange but I set it and then leave the phone for a bit .. Turn it on and it's off WiFi .. It reconnects to my WiFi and I go back into the setting and it's reverted back to Never ..

Guess I may look at the "unroot" to get to 2.3.4 ..

I had the same problem as you after the OTA update to UCKK6 (2.3.6), so I used the step by step instructions found [Only registered users can view links. ] to return my phone back to Stock UCKH7 (2.3.4), without incrementing the flash counter. NOTE: Use step 2c in the instructions

[silverbugeye]

Step 2c worked for me also

[kevinqian]

Originally Posted by melder52

Hard to tell if the "screen off" tweak works or not because it keeps reverting to Never. Very strange but I set it and then leave the phone for a bit .. Turn it on and it's off WiFi .. It reconnects to my WiFi and I go back into the setting and it's reverted back to Never ..

Guess I may look at the "unroot" to get to 2.3.4 ..

You must have a rogue app that's changing the settings on that. It's usually a streaming or wifi syncing app that requires constant on wifi connection. For me, it was Doubletwist's Airsync that kept reverting it to Never. After I disabled the app, it never switched on me again.

[lchute1158]

what should I see under battery usage for android os? I had the os using 82% before I put unnamed rom on. It is now fluctuates between 25 and 50% still higher than display.