Battery 30% then dies suddenly

Sheza

macrumors 68000
Original poster
Aug 14, 2010
1,724
1,228
Hi,

I have had this happen to me quite a lot recently. I will be on 30% battery, and then all of a sudden my phone just dies. Flat out. Refuses to turn on until I plug it in to a charger, where it will turn on and then claim it instantly has 26% battery or something like that.

Any ideas how to fix this? This is happening on my iPhone 6 and also my gf's iPhone 6S.
 
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Sheza

macrumors 68000
Original poster
Aug 14, 2010
1,724
1,228
Is it cold?
Is what cold?

I use it with average temperatures in the UK. Perhaps in the range of 15-20 degrees centigrade?

The phone itself is again... average temperature.
 

Gav2k

macrumors G3
Jul 24, 2009
9,218
1,584
Is what cold?

I use it with average temperatures in the UK. Perhaps in the range of 15-20 degrees centigrade?

The phone itself is again... average temperature.
I was referring to outside temps as rapid drain or powering off can occur during cold temps.
 

johannnn

macrumors 65816
Nov 20, 2009
1,406
776
Sweden
My 6S+ has shut down twice since launch, and both times has been while playing with it outside. So I think temperature is a factor here. However, I'm talking about ~5°C so I can't really understand how a phone can be so temperature sensitive.
 

jahall05

macrumors 6502
Jul 30, 2013
251
19
If they are under warranty Apple will swap the batteries out if they are causing issues. They will probably want you to restore them first though to eliminate any concern of software causing problems.