The issue could be caused by a time-zone bug, according to report

Nov 1, 2011 09:44 GMT  ·  By

The battery drain issue plaguing iPhone 4S users may be related to a software bug that can be eliminated (temporarily) by tweaking some of the settings.

According to reports, the bug is tied to the time-zone functionality of the iOS. Switching it off reportedly improves battery life, but it is unclear whether or not this is the only issue that causes the battery train on Apple’s latest handset.

This is not the first time a major iOS update takes its toll on the battery life of iDevices. Both iOS 3 and iOS 4 have posed such troubles for many users.

Apple usually dispatches incremental updates to alleviate such problems. It has also been reported that the company’s engineers are working directly with affected customers to try and pinpoint the cause of the battery drain in order to implement a fix in the next software update.