Why is the battery percentage on my iPhone 4S on iOS7 freezing then dropping in big 10/20% chunks?

Question

Since upgrading to iOS7 my 4s has been having issues with battery meter. Take today for instance, it fell steadily to 59% then dropped instantly to 39% (I was not using any apps at the time). It has now been stuck on 32% for over half an hour, I've taken photos, used YouTube and other apps in an attempt to drain it but no change.
I've turned off all unnecessary processes, including location services and background refresh to eliminate drain. System status meter shows processor operating at 10% when no apps open so it doesn't look like background processes are draining.
I can't rely on the battery meter when it isn't accurate, it could suddenly drop to 5% or similar without warning.
Is anyone else having these problems?  Any ideas Apple?
It's going to render my phone untrustworthy and inaccurate.

Answer 1

Hi!
I am having similar issue.
I have upgraded my iPhone 4s to the new iOS 7 and since then my battery indicator is stucked at 44%. Now regardless how much I charge or how much I use, it is showing the same battery level.
Although this get refreshed when I restart the iPhone and it shows the current battery level and then again stucks at the same percentage. This was working fine on iOS 6.1.3, but is showing issues after the upgrade.
I have tried to restore it, reset settings by selecting Erase All Content and Settings, hard reset (power+home button for 10 sec) but still no good, it shows the same level of battery percentage at which it is since last reboot.
Although I was having iOS 6.1.3 ispw so I downgraded it again as Apple was signing iOS 6.1.3 at that time. Now the battery percentage is working fine. Therefore its not a hardware issue for sure and is just some bug with iOS 7.
Now I have again upgraded to iOS 7.0.3, and I am facing the same issue again. And now I can't even downgrade to iOS 6.1.3.
If you get some tips on how to solve this, then please share the same.