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Old 03-07-2010, 01:46 AM   #1 (permalink)
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Default Extreme battery drain with OS 5

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A few days ago I have upgraded my 8900 to OS 5. Ever since it goes from a full battery to an empty one in less than half a day. Under 4.6 I get about 2 days of use out of a single charge.

I have tried 2 different versions of the OS (860 / 509 and 760 / 461) and manually uninstalled all conspicuous software until nothing was left. Then I tried JL_Cmder but couldn't get it to connect so I used loader.exe with the /nojvm option to wipe the handheld and re-install the OS but still without success.

Now that I have wiped the handheld there should be nothing special about it anymore (not that there ever was). I use UMA on T-Mobile USA and a 2 language setup (English and German). Otherwise, at this point, it's all stock options after a fresh install.

Any ideas what could be going on? Your help is much appreciated.
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Old 03-07-2010, 03:19 AM   #2 (permalink)
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how new is the battery?

and i bought my 8900 and used 4.6 for about 30 min so i dont have any benchmarks to compare to... but i get 1.5 days MINIMUM use out of my new (less than 6 months old) battery. this is about 5-20 min of edge/UMA calls and a shit load of data (a few hundred emails, about an hour of mp3 streaming and a few more of playback... and plenty of web use.


just curious, what build of 5 were you using?
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Old 03-07-2010, 08:54 AM   #3 (permalink)
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Wirelessly posted (Lets Go Canes!)

Press alt + esc on your phone. Are you running unnecessary programs? Make sure to close programs you are NOT using. If you are NOT using the bluetooth disable it.
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Old 03-07-2010, 04:06 PM   #4 (permalink)
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As far as is discernible with the means of the OS I ran a completely vanilla OS 5. The last day I had absolutely nothing installed on it and not even my data was on it. No programs were running other than those stock programs that always run (browser, mail, messenger, call log). Bluetooth was off. Yet the battery was still exhausted after less than half a day.

The battery is less than a year old and works perfectly fine under 4.6 where it gives me on average 2 days of use between charges. Running OS 5 the back of the device was always comfortably warm even after not accessing it for longer periods. It was obvious that the handheld was 'working hard' even when it seemingly did nothing (ie on stand by, locked and the screen off). Under OS 4.6 the handheld stays cool while on stand by.

I'm now reluctantly back on 4.6 and battery life seems back to normal. OS 5 is noticeably nicer. No huge 'in your face' differences but lots of refinement everywhere. But obviously it's useless to me if the battery doesn't last even close to a day. This is a bit disheartening since nobody else seems to have the problem and my handheld was as wiped and as vanilla as I know how to make it.

At this point I'm hoping somebody knows a better way to clean my device of all traces of prior use so I can give it another shot.
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Old 03-08-2010, 02:59 AM   #5 (permalink)
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It looks like the battery problem is solved. I have finally succeeded to wipe the handheld with javaloader. The OS 5 installed after that doesn't seem to have the battery problem anymore. Well, at least as far as I can tell after 5 hours or so (previously the battery would have been close to empty at this point).

What I had missed previously was that javaloader needs to be started with administrator rights under Windows 7. Once I have done that it had no problem connecting to my Blackberry.

Of course now I have another problem, my BB has forgotten about its BIS settings. But that's a story for another thread: 'Restoring BIS after 507'.

Thanks to everybody who tried to help!
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