Phone Battery Drains Very Fast

[LucianAndries]

Hello!

I bought my parents a pair of Samsung Galaxy S4 Mini...

The issue is on my mother's side, the battery drains like hell, even without doing nothing on the phone all day. I checked the battery and it looks ok, it's not swollen or anything.
I also disabled some apps on the phone. Did not install any other apps either.

So the battery goes bye-bye in less then 10 hours. Just by being on. It might drain even when turned off, not sure... :-s

I did the following: I switched the batteries between the phones.
My mother's battery was showing 65%, but now on my father's phone it shows 88%......
My father's battery which was arround 90%, now was showing 55% on my mother's phone............
I have no clue what is going on! But one thing is clear, the battery isn't the problem.

So what could it be?
The Firmware? If so, I can reflash the phone very quick.
The micro-usb board? I can change that one too.
I just hope it's not the mainboard. That's like almost an entire phone... I had to change the mainboard on a Samsung Galaxy S2, but then I always had all kinds of issues with it. So I hope it's not that one. 🙁

The problem is that, I don't know how exactly to pinpoint what is causing this.
Can someone teach me how to do it? That is all I ask.

Thank you in advance!

 

[MCMunroe]

Very simple. Is the battery over 18 months old?
The lithium batteries all last about 18 months or 500 charge cycles. If you count on charge a day that gets you about 18 months.
All batteries will vary. I even bet your mother and father have different habits with the phones. Also the phones "learn" the batteries, thus the different readings when you switch them.

My mother has an S4 Mini as well. She kept complaining about the same thing. I just got her a battery from Amazon. Problem solved.

Spend the $10 on Amazon and order new batteries.

 

[LucianAndries]

Very simple. Is the battery over 18 months old?
The lithium batteries all last about 18 months or 500 charge cycles. If you count on charge a day that gets you about 18 months.
All batteries will vary. I even bet your mother and father have different habits with the phones. Also the phones "learn" the batteries, thus the different readings when you switch them.

My mother has an S4 Mini as well. She kept complaining about the same thing. I just got her a battery from Amazon. Problem solved.

Spend the $10 on Amazon and order new batteries.

Hey, thanks for the reply!

So the battery is bad and dying EVEN if the battery is not swollen????
I know that phone batteries have to swell up, to be bad.....

 

[sizzling]

Phone batteries do not have to swell up to be bad, that is incorrect. Being swollen means the battery is damaged but it can be dying or dead and look the same as a brand new battery. Generally a swollen battery is one that's been over heated.

 

[LucianAndries]

Phone batteries do not have to swell up to be bad, that is incorrect. Being swollen means the battery is damaged but it can be dying or dead and look the same as a brand new battery. Generally a swollen battery is one that's been over heated.

Hey.

Thank you for clearing that up for me!
So a new battery it is then.

 

[LucianAndries]

Also the phones "learn" the batteries, thus the different readings when you switch them.

Hi again.

So the phone doesn't have a Firmware issue also... That's good.
I would have reflashed it, no problem. But, this might happen again after the reflash. So now I know it is not a real problem.

Thank you for your help, the battery is on its way.

PS: You don't stay here very often, do you...?