[OBSOLETE] Recalibrating Your Battery Stats...

[joeybear23]

***
Due to further information from both the hardware and OS side of the house, it has been determined that this process is completely unnecessary for the Captivate.
You may still follow this procedure if you like or if it makes you feel good.
Good luck and God bless.
***

So, you are having trouble with your battery seemingly draining too quickly, especially after having flashed many ROMs/Kernels/etc...

It is possible that the problem (or part of the problem) is not necessarily the phone using too much power, but rather the phone not really knowing how much power you have left, or where 100% or 0% really are. If this is the case for you, you should see some results from doing the following:
(Do at your own risk. If your phone runs away and joins the circus I am not responsible)


1. Connect the phone to the charger with the phone powered on, and allow the phone to charge until it shows 100%

2. Disconnect the phone from the charger, and power it off.

3. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the battery indicator shows 100% (you can use vol-up/vol-down to make the indicator come back up when the screen goes to sleep).

4. Disconnect the phone from the charger and power it on.

5. Use the phone as normal until it shuts off, then plug it in, turn it on and use as normal, charging whenever you like.

You should only need to use this sequence one time.



Hope this helps.

 

[joeybear23]

...
10 char

 

[KJPDX]

Thanks for posting this, I remembered seeing it in another topic but I couldnt find it anywhere.

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[joeybear23]

Thanks for posting this, I remembered seeing it in another topic but I couldnt find it anywhere.

Sent from my SAMSUNG-SGH-I897 using XDA App

Yeah, I had it in a text file on my computer from a little while back, and was going to bump the topic but I couldn't find it anymore.

This may have to be done again after ROMs and stuff, so either bookmark this post, or copy-paste it into a document on your computer you can refer back to later.

 

[joeybear23]

Also, this give creedence to the age-old, often-debated theory that you should give your battery a full charge before turning on your phone for the first time...

 

[mwxiao]

It makes me sick when we have to do all this crap.

 

[joeybear23]

It makes me sick when we have to do all this crap.

Sorry, it's a price we pay for messing with the software/firmware on the phone.

Also, if people did an actual full charge before using their phone for the first time, there would probably be fewer "Battery Life Sucks" threads...

 

[sfernandez]

Dont forget to boot into recovery after you full charged (adb reboot recovery or Power off the phone and then hold the volume up + Volume down + the power key. When it goes black the 2nd time release the power button and keep holding the volume buttons.) wipe stats Clockworkmod recovery -> advanced -> wipe battery stats.

 

[roadrash7]

Question for ya's.when I got this phone the att dude just turned it on and gave it to me without allowing for a full charge.should I go back slap him in the face and get a new battery and fully charge it before first use, cause its almost been two weeks and my batt life still seems kinda poor to me.

Also if I do that should I unroot and restore the att apps or will they not notice or bother to check that

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[derek4484]

Recalibrating may help slightly, but the Captivate just has a ****ty battery life. Read here, it was the worst in the entire test. No coincidence, the S-AMOLED's came in last in battery life and the S-LCD's came in first.

http://androidheadlines.com/2010/08/android-phones-battery-tests-are-in-and-we-have-a-winner.html

 

[k2snowboards88]

Recalibrating may help slightly, but the Captivate just has a ****ty battery life. Read here, it was the worst in the entire test. No coincidence, the S-AMOLED's came in last in battery life and the S-LCD's came in first.

http://androidheadlines.com/2010/08/android-phones-battery-tests-are-in-and-we-have-a-winner.html

Without any details of how that test was performed, the results are meaningless.

I get battery life as good as my old iphone with the captivate. I wish it was better but it seems very competitive to me.

 

[dougp.me]

Recalibrating may help slightly, but the Captivate just has a ****ty battery life. Read here, it was the worst in the entire test. No coincidence, the S-AMOLED's came in last in battery life and the S-LCD's came in first.

http://androidheadlines.com/2010/08/android-phones-battery-tests-are-in-and-we-have-a-winner.html

Something doesn't make sense since the Epic 4G has better battery life than the Captivate. Me thinks they didn't test these properly.

 

[derek4484]

Without any details of how that test was performed, the results are meaningless.

I get battery life as good as my old iphone with the captivate. I wish it was better but it seems very competitive to me.

I can't even come close to the same battery life on this captivate as I did with my old iphone. I have to charge this phone every single night, where with my iphone I only had to charge it 2 or 3 times per week. I take it off charge every morning and by 10pm its down to around 20%. My old iphone I could go 2-3 days, and I do the same things on both phones. Checking facebook and twitter, playing a little bit of kingdoms live, a little websurfing, and checking emails, as they come in.

Same usage and 1/2 to 1/3 of the same battery life. Not so good.

Also, you cant say the test was meaningless because they dont tell you how they tested it. As long as they ran the same test on all the phones then a direct comparison of battery life is very legitimate and meaningful. But I agree, I would like to know what their testing methods are.

 

[foxbat121]

I can't even come close to the same battery life on this captivate as I did with my old iphone. I have to charge this phone every single night, where with my iphone I only had to charge it 2 or 3 times per week. I take it off charge every morning and by 10pm its down to around 20%. My old iphone I could go 2-3 days, and I do the same things on both phones. Checking facebook and twitter, playing a little bit of kingdoms live, a little websurfing, and checking emails, as they come in.

Same usage and 1/2 to 1/3 of the same battery life. Not so good.

Also, you cant say the test was meaningless because they dont tell you how they tested it. As long as they ran the same test on all the phones then a direct comparison of battery life is very legitimate and meaningful. But I agree, I would like to know what their testing methods are.

By old iPhone, do you mean 1st gen EDGE only iPhone? If that's the case, you can disable 3G on Captivate and get similar battery life.

 

[mterrence5]

Without any details of how that test was performed, the results are meaningless.

I get battery life as good as my old iphone with the captivate. I wish it was better but it seems very competitive to me.

If you go to the actual Laptop magazine post it explains

The test itself is fairly simple. Avram, our tireless Web director, modified the LAPTOP Battery Test we use for notebooks, and created an Android App that does much the same thing: It opens the phone’s Web browser to one of 60 popular Web sites, remains there for 60 seconds, closes the browser, then reopens the browser to next Web site on the list. It does so until the phone’s battery dies, all while recording the time elapsed.


Here’s how we set up the phones before we tested them:

First, we download My Settings and Advanced Task Killer, two free apps that are useful regardless.
Then, we open My Settings, and do the following:
Turn screen brightness to 40%, and turn off auto brightness.
Turn off Wi-Fi, Bluetooth, GPS location, cell location, and auto sync.
Deactivate screen timeout; that is, make sure the screen stays on indefinitely.
In the Web browser, we turn off Flash support and plug-ins.
We placed the phone in an area that was receiving at least 4 bars of service.


http://blog.laptopmag.com/android-battery-test-reveals-droid-x-lasts-longest-amoled-handsets-trail

Sounds about right to me although I dont think I could get 4.43 hours web. Most screen usaged I have gotten is up in the 3hour range.

 

[darkamikaze]

I've done this on my captivate.. and I think it made it a little worse..

to be honest.. just leave it be and charge when you can.. lol hope for the best!
maybe other people will have better luck..

 

[qwertyaas]

Many people also seem to have success with fully discharging their battery before charging it again for the first 2-3 times. Seems the battery learns its 'boundaries'. Many are reporting 20-30 hours after that with moderate usage.

 

[k2snowboards88]

If you go to the actual Laptop magazine post it explains

The test itself is fairly simple. Avram, our tireless Web director, modified the LAPTOP Battery Test we use for notebooks, and created an Android App that does much the same thing: It opens the phone’s Web browser to one of 60 popular Web sites, remains there for 60 seconds, closes the browser, then reopens the browser to next Web site on the list. It does so until the phone’s battery dies, all while recording the time elapsed.


Here’s how we set up the phones before we tested them:

First, we download My Settings and Advanced Task Killer, two free apps that are useful regardless.
Then, we open My Settings, and do the following:
Turn screen brightness to 40%, and turn off auto brightness.
Turn off Wi-Fi, Bluetooth, GPS location, cell location, and auto sync.
Deactivate screen timeout; that is, make sure the screen stays on indefinitely.
In the Web browser, we turn off Flash support and plug-ins.
We placed the phone in an area that was receiving at least 4 bars of service.


http://blog.laptopmag.com/android-battery-test-reveals-droid-x-lasts-longest-amoled-handsets-trail

Sounds about right to me although I dont think I could get 4.43 hours web. Most screen usaged I have gotten is up in the 3hour range.

I think that turning all of the screens to 40% brightness invalidates the results. To equal the playing field, the screens should be set to equal luminance.

 

[phlunkie]

My battery meter has been flashing 0 for 10 minutes now. Should I be worried? Should I return my phone? True story.

Sent from my SAMSUNG-SGH-I897 using XDA App

 

[phlunkie]

Still here. Battery hasn't died.

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