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Old December 12th, 2011, 01:26 PM   #1 (permalink)
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Question San Francisco 2 Battery life

What are other SF2 owners finding battery life to be? For me, it's really poor. I might get through a working day without needing to charge up but today, it was down to 20% by 3pm and I haven't used it much, just emails and a little internet. Not even any phone calls.

Wifi seems to be taking a lot of battery and I'm not even using it during the day (although I haven't been turning it off, it's not something I've had to do with previous phones or my iPod). I don't really want to have to turn it off and on gain when I need to use it. That's a lot of hassle!

I have seen mixed reports about battery life for the original SF, maybe I have a bad one?

Rgrds

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Old December 15th, 2011, 06:49 AM   #2 (permalink)
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I'm getting about a day and a half per charge, depends how much I've been using it, so that would be an average. Usually get more than a full 24 hours though
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Old December 15th, 2011, 12:37 PM   #3 (permalink)
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I'm getting a day and a half to two days. Wifi & full sync on.
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Old December 16th, 2011, 07:57 AM   #4 (permalink)
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Originally Posted by fr0d0 View Post
I'm getting a day and a half to two days. Wifi & full sync on.
That's way better than I get - maybe I've overdone the apps I've downloaded and have running. I'm amazed at how much seems to be running when I check in the apllicataion manager. Why does maps need to be running, for instance? I've no idea how much juice each of the processes and services is actually using .

Wifi seemed quite hungry and, as I don't have wifi access at work, I tend to turn it off. That seems to help.

Thanks for the reports - it helps.

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Old December 16th, 2011, 03:45 PM   #5 (permalink)
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Some apps take more juice than others. Lots of apps run in the background seemingly pointlessly. I think there are some good tips in the SF1 area to help with battery life. I've recently seen some tips on getting the most of your battery too.. Over charging and resetting the level guage with an app.
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Old December 20th, 2011, 10:31 AM   #6 (permalink)
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I've had a mixed bag with the SF2 battery. For the first week I thought it was atrocious, I could barely get a day out of it, but it seems to have bedded in a little and I'm getting just about 2 days out of it now, so it's acceptable.

It's nowhere near as good as the original SF, which could get by for 3 days (or a nearly week on standby, using Swedish_Spring). I'm going to get rid of the stock ROM, as I'm convinced the Orange bloatware doesn't help (though to be fair it doesn't seem as intrusive as the SF1).

I think that 3G data connectivity seems to use a more power than WiFi, so if you have WiFi available, turn it on and you'll save more battery power like that.
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Old December 28th, 2011, 04:36 AM   #7 (permalink)
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Quote:
Originally Posted by fr0d0 View Post
I've recently seen some tips on getting the most of your battery too.. Over charging and resetting the level guage with an app.
I'm new to the forum, could you tell me where you saw that?
Mine lasts 24 hours & I only use it for phoning & texting, it loses charge overnight!
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Old December 28th, 2011, 05:46 AM   #8 (permalink)
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I unlocked my SFII on Friday 23rd when I got it, its now debranded and running the full version of Power Manager, so I can turn on/off stuff at will and it allows me to set my own profiles. Recently I emptied both caches and after allowing my phone to get to a full 100% charge I them emptied the battery stats in the Restore screen.

At this point I had to let it get flat normally and not charge it until it was at the critical stage. I used the phone and to be honest unintentionally hammered it with installs, program usage and generally messing about with my son who is 100 miles away and comparing stuff.

Rebuilding the caches the first time cost me 10% power
Wi Fi hammers it, but then 3-4 hours on is not bad, a case of use it when you need it
I put Tango video chat on for me and my son, that hammers it the most-but expected
Standby overnight resulted in only 1% loss which is acceptable.

16 hours later and still a good 55-60% left !!! But then we hammered it some more and I got 24 hours out of it before it went critical and I plugged in the USB cable again. From this I infer 1-2 days of normal use and I feel a lot more comfortable about it now.

After all, this is a GPS enabled phone with Sat/Nav capability, video conferencing with both front and back cam, Bar Coder, Email, Wi Fi etc. Mine runs Quake 1, Quake 2, Real Racing 2 and lots lots more. The original San Fran was a 600 CPU, the newer SFII is an 800 CPU and that takes more oomph! All in all I know I got a bargain and I`m well pleased with it.

I use Power Manager (62p) to control the settings I want, a licensed Titanium (3-4) to backup and I swapped in a 16gig MicroSD card partitioned at around 7.5 for each of the two partitions (lost 1 gig). I set both Partitions to Primary, the first to FAT32 and the second to EXT2 for APP2SD (free) then set it to transferring any possible Apps to the SD Card rather than the phone. I now feel contented using this tuned setup with the debranded ROM I put in.

Steve
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Old December 28th, 2011, 05:20 PM   #9 (permalink)
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Quote:
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I'm new to the forum, could you tell me where you saw that?
Mine lasts 24 hours & I only use it for phoning & texting, it loses charge overnight!
There are lots of guides around. Here's a good one: Battery Recalibration ProTip - Android @ MoDaCo

If you don't have clockwork mod installed some of the rom tools will reset the stats fully booted. All methods need root access afair.

Thing is what do you have running and are you considering the effect on your battery? If you're leaving on wireless all day when you're not using it for example... same with apps etc you have running. It goes without saying: If you want to extend battery life between charges you need to be running only what you need.

Better resource: http://forum.xda-developers.com/showpost.php?p=11803458&postcount=10
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Last edited by fr0d0; December 28th, 2011 at 06:35 PM. Reason: better resource found
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