Rapid battery drain on new Samsung Galaxy SIII

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  • Updated 4 years ago
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After updating to OS 4.3 a few days ago my one month old phone's battery drains at about 20% an hour without even using it. All apps are closed.
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Linda Temple

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Posted 4 years ago

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John Burke, Mobile Master

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Do you have perhaps Google accounts that haven't been properly sync'ed? They might be trying to continuously connect.
Settings--> Accounts--> Google
Only check the parts you'll need & uncheck the rest.

Also, the GPS might be switched on, so if you don't need GPS you should toggle that off.

Another thing that drains the battery quick is having your screen brightness at 100%.
Personally when I'm indoors I keep it at 0% and only raise it to 100% when I'm about to go outside.
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Paul Deschamps, Mobile Master

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Also the S3 is terrible for battery life in general from my experience with it, it couldn't even make it through a day at all.
After an update it can take a little time for the battery to get working to its max just like when you first buy a phone, it takes about a week or two after an update for things to level out. Always do an update with a full battery while the device is plugged in and drain the battery till the phone shuts off and then charge it fully and repeat again for the second charge. I've done this with every phone I've had and never had battery issues after an update.
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Linda Temple

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Sorry I replied to John and Paul but don't know where my comments went :(. It's my husband's phone and he keeps his screen brightness midway. (We're seniors and he says he sees it better there...I, on the other hand, turn it right down as I can't take the glare.) I'll look into the Google sync as he has it sync to an office program for some work he does. I noticed his phone was set for automatic updates so don't know if the OS was automatic all I know is that it was a couple of days ago and he's had the phone plugged in almost constantly since. Hope you're right, Paul, and it levels off as this is nuts. You unplug the phone and you can watch it drain within seconds and he's not even using it.
Thank you for your suggestions and I will look into them and see if any help his situation.
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Robert, Mobile Master

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Also, I don't know if it's valid for the S3, but on the S4, I went on the application menu and looked at what apps were running while using the phone. When I saw an app I didn't need, I clicked on it and disabled it.

For example, on the S4, everything that was bloatware (S Health, S Calendar, Story Album, Samsung App Store, etc.) was disabled because I never used them and they kept running in the background without any benefit!
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Linda Temple

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I'm sure there are quite a few he doesn't use...thank you..I'll look into that too.
I went into the apps settings and turned off the notifications and that seems to have helped already :) Thanks.
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Robert, Mobile Master

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No problem. Happy I helped.

Also, here's another suggestion. In your Google location service turn off Location Reporting + Location History. They are completly (or almost) useless and drain battery by asking location quite often.

Another one : Do you use Google Now? If not, disable it. No use for it.

Finally, here's an handy and free app for you so you can monitor what uses the battery. Then search Google and you'll manage to get a full day of battery in under a week : http://forum.xda-developers.com/showt...
Download link is in this post : http://forum.xda-developers.com/showp...

How to install :
Download it to your phone (version 1.15)
Allow app installation from unknown sources in setings
Install the app
Enjoy!

PS: A quick explanation of the app : http://www.alliance-rom.com/wiki/bett...
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Linda Temple

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Thanks, I'll give it a try.
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Daniel Kim, Mobile Master

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Also if it takes long to charge, you can put the phone in airplane mode while it is charging and it will charge much faster. However you can't receive any calls while your phone is in airplane mode.
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Linda Temple

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Thank you...didn't know that.
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Ivan, Mobile Master

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But as you've said, you can't actually use your phone like this so is it really worth it?
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Linda Temple

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For my phone I'd consider doing it overnight.
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Gerry Sander

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Try this..It is like doing a reboot on your phone. Remove the battery when it starts to get weak while the phone is on . Re-insert the battery and turn it back on ,then charge the battery. This worked for me. What happened in my case was the phone would drain overnight with all apps off.,including data,wi-fi,location,,etc,. Once I did this re-boot, the battery sometimes lasts up up to 3 days depending on usage.Mind you I still have to do this on ocassion when this misterious draining of the battery rears it's ugly head.

Cheers
gesan007
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Ivan, Mobile Master

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Your willingness to help is appreciated, but this post has been dead for 8 months and marked as answered.
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Linda Temple

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Thank you. Did that but now have a work iPhone and have given up on the samsung other than on wi fi for apps.
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Linda Temple

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No longer using this phone.

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