S7 Edge Abnormal Battery Standby Drain (


New member
Mar 24, 2016
Visit site
S7 Edge is the Phone - Locked to Freedom Mobile (Canadian Provider), running Marshmallow

Hello. I was originally going to post on r/Android before finding out that phone questions would be removed so here I am. For the longest time I've had an issue with my S7 edge where it drains rather quickly on Standby.

I got sick and tired of it so yesterday I decided to do a test where I'd leave the phone idle for 13 hours and see how much it drained.

The results were as follows
81% - 6:26pm -
59% - 7:34am

So that translates to roughly 22% in 13 hours. And I don't even have AOD on, when I first got the phone it would drain like 5% in 10 hours, so to see it go up that much is rather alarming.

Note: I used the phone once in that entire period to change the alarm to 5:30 am (which I slept through anyways lmao), I got one phone call (which I ignored), and that's about it.

I use Greenify so that literally every app that doesn't need to be running in the background won't be on standby and this amount of drain seems rather large to me since it should only drain around like 10-15%, or am I wrong and is 22% in 13 hours normal for an S7 Edge? On another night it drained around 16% in 9 hours, which is really frustrating, for me anyways, and this is a consistent trend.

I can't tell what app is the reason (if an app is the cause, that is). I have an imgur album that includes all my battery data from GSM battery monitor and the Android Battery system for that 13 hour duration. I included as much as possible so if anyone who knows more about how these things work could tell me why the phone is draining that quickly, it would be really appreciated!


Feel free to ask any questions and I will respond to the best of my ability! Thanks in advance.

EDIT: Also, for anyone wondering about that 4% screen on issue, I used the phone for about 18 minutes before taking those SS, which is where that part comes from.

Note: I'm not a heavy social media user, the only apps I have being Messenger Lite, Swipe Pro (FB Client) and WhatsApp.

If I turn off WiFi the battery drains only 2% in like 9 hours, but that is a nuisance for me, as I'd rather have my WiFi on during the night. If anyone knows what's up, that would be really helpful.

B. Diddy

Senior Ambassador
Mar 9, 2012
Visit site
It might help to see some other battery stats. This is what I typically ask for:

Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

1. The main Settings>Battery screen.
2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
3. The Screen category (to see total Screen On time).
4. The Cell Standby category, if present (to see Time Without Signal).


Use GSam Battery Monitor to get the Cell Signal Strength graph.

The relatively high Cell Standby usage suggests that at least for some of the time, your cell signal is mediocre or poor, which can contribute to battery drain. But also remember that even if you're not using the phone actively, processes may still be running and data syncing in the background, which require power -- and these may be from the system, which you probably can't hibernate with Greenify. In my experience, my phones, if left idle (but not allowed to Doze), will last maybe 24-48 hrs before needing to recharge. In order for Doze to activate, the phone has to be completely immobile for a certain amount of time, so if you're always carrying it around, it won't Doze.

Is there any reason why you need wi-fi on while you're asleep?