Battery life on 5S seems "jumpy"

MrMister111 said:

I've had my 5S since Oct last year. I'm finding lately that my battery life is a lot poorer than used to be (disregarding age related).

Also it sometimes seems to jump a large % down, eg it says 20% left message literally 2mins later it's at 14% or similar.

Is it faulty? Should I get it checked out? I've cycled the battery as in let it go flat, then ha the up fully.

Thanks

Click to expand...

Battery life depends on usage. What are you doing when the battery drops from 20-14%?

iBackupBot can check your phone and tell you the current battery health. Otherwise you can just take it to an Apple store and have them check it out.

MrMister111 said:

I was just browsing on WiFi. It shouldn't drop that quick though within 2mins no matter what. That was an example, other things happened to.

Click to expand...

It certainly can happen in two minutes, it depends on what is happening. Basic browsing shouldn't cause it though. I guess if you were on 3G/4G and had poor signal, that could do it.

Extreme hot or cold temperatures can also cause poor battery life.

What is iBackupBot? What do I do? Need? Buy it? How does it work? My 5S isn't jailbroke btw

Click to expand...

It's a program you install on your computer. I'm pretty sure I downloaded it for free, and it doesn't require a jailbroken phone.

Rapid battery percentage drops are generally indicative of the battery developing high internal resistance towards the end of the charge. Life is great until you've used up 3/4 or so of the battery, then the load causes increased voltage drop, so you get that non-linear decrease in the percentage gauge.

The gauge is based partially on battery voltage, and partially on how many maH you have consumed. If the voltage drops suddenly it will show a lower percentage.

Either way, the battery is likely boned, or getting there. Get it replaced, especially since all 5S should still be under warranty; it's free.

MrMister111 said:

Think I need to check with Apple as just seems in general to be draining faster than normal.

Seems to get hot a bit also sometimes which is an indication that battery is no good.

Click to expand...

Heat isn't necessarily the battery. Some process may be running in the background and using a lot of power.