Battery goes down by 2 percent per 10 minutes

[Rocco2V]

Hello, I am new here, so excuse me if the thread is in the wrong forum.

I got a problem with my battery, when I was on iOS 10.3.2 the battery goes down by 40% when I go to sleep, now when I updated to iOS 10.3.3 beta 3, it is the same for the night, I charge it up to 80%, and when I wake up it was 42%, now I charged my phone (11:50 was on 80%) and I remove it from the laptop (the last time I charge it in my laptop to see if there is any difference, but no), and yes I use 3rd party wall adapter, but original cable (its second hand 5s). I restore it when I was on iOS 10.3.2 but there is again no difference.
The charger is some Chinese AC adaptor.

P.S. I stop the Push Mail, background app refresh, most of the notifications, location services and etc. Low Power Mode feels like it drains battery even faster.

 

[bbrks]

Battery R.I.P.

 

[Rocco2V]

Battery R.I.P.

It's new

 

[Mlrollin91]

It's new

What's the health of the battery (if you have a Mac you can check with coconut battery). Sounds like it's a faulty battery. I would also use an OEM charger/cable.

 

[Rocco2V]

What's the health of the battery (if you have a Mac you can check with coconut battery). Sounds like it's a faulty battery. I would also use an OEM charger/cable.

No, I don't have Mac, but battery life says it's 97%.
P.S. I forgot to mention that when I shutdown the phone, the next morning battery isn't go down with even 1%.

 

[bbrks]

Than try restore and setup as new, no backup please!... and see how it goes....

 

[Mlrollin91]

No, I don't have Mac, but battery life says it's 97%.
P.S. I forgot to mention that when I shutdown the phone, the next morning battery isn't go down with even 1%.

That app is highly inaccurate. It estimates the battery wear and is not real time. When that app says my device is 99% it's actually closer to 94%. So if your device is around 90% it would start to explain the poor battery life. At 80% health the battery is used up.

 

[Rocco2V]

I found something in How-to Geek (https://www.howtogeek.com/254739/how-to-check-your-iphones-battery-health/). I download that "iBackupBot" and it's says what the battery life says. Well its obvious that the battery is on more than 15 cycles.