3GS Battery Dies Randomly

[leitmotif]

Over the past few months my 3GS will shut off and not turn on as if the battery were dead intermittently at around 65% or 35% battery life. Is my battery just on its last leg? Should I bite the bullet and upgrade to 4S? It is very frustrating writing an email or something only to have the phone cease at 65% and not be anywhere near a charger.

Has anyone else encountered this issue? I searched a bit on the forums and didn't find any info.

 

[FiXPOD]

iPhone Battery Repair

Often a problem like this is not actually a problem with the battery itself but the OS or "rogue" apps draining the battery life. Often just restoring the iPhone fully will fix this issue.

We have some more information on our website about fixing this issue:

 

[mustang1908]

I have a very similar problem, which only started after installing iOS 5. Are you running iOS 5 or iOS 4? See my post at the bottom of this thread:

https://forums.macrumors.com/showthread.php?p=13943725#post13943725