Why is my Galaxy s3 i9300 draining battery fast ONLY when Wifi is enabled?

[Bence 11]

I already did:

-Factory reset
-Reinstalling original Rom
-Gsam battery doctor (did not help)
-No useless CPU processes
-Bought new battery

com.supercell.boombeach is okay, it's a game that I'm playing and needs wifi connection (the problem began before I downloaded that game)

 

[GSDer]

Welcome to the forums!

Unfortunately you did not include the third piece of the puzzle - there's nothing showing the Screen use details. In that 20+ hours of total time if the screen was on anywhere near three hours then your battery seems to be behaving normally.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM -0.001 using Tapatalk

 

[Bence 11]

Welcome to the forums!

Unfortunately you did not include the third piece of the puzzle - there's nothing showing the Screen use details. In that 20+ hours of total time if the screen was on anywhere near three hours then your battery seems to be behaving normally.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM -0.001 using Tapatalk

Hey!

Thanks for your reply, I checked it, it says 47mins. Unfortunately I couln't include the screenshot.
Also I noticed that this thing began to happen when the 4.3 update came out.

 

[GSDer]

Well I don't see anything obvious with one hour of Screen On time; I would have expected more than that.

It does seem that the precipitous drops correlate with Wi-Fi on, but that's also when the screen is on, so it's hard to lay the blame solely at the feet of Wi-Fi. You'd have to isolate Wi-Fi to get to the bottom of the issue.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM -0.001 using Tapatalk

 

[Sawsiee]

i had the same problem, they told me to get a new battery. the problem is, if you leave your phone on the charger even after it's already full! the battery will over charge and by time it will start to have that problem. so an advice would be make sure to not go to sleep while your phone is on the charger or just make sure to unplug it when it's already 100% full.

 

[GSDer]

if you leave your phone on the charger even after it's already full! the battery will over charge and by time it will start to have that problem

Based on the results with my phone I'd have to say that's inaccurate - I've had it over two years and have put it on the charger every night and left it there while I slept, and the battery seems to be unaffected by 'overcharging'. YMMV.

Sent from my rooted, debloated, deodexed Sinclair ZX-80 running CM -0.001 using Tapatalk