Facebook admits it might be killing your iPhone battery life

Facebook has confirmed that it is currently investigating claims that its iOS app is causing a significant amount of battery drain.Reports of the battery drain began cropping up earlier this week, with one user, entrepreneur Matt Gilligan, explaining in a blog post that Facebook's iOS app was causing up to 15% of battery drain over a 7 day period.Interestingly, in Gilligan's situation, he had the background app refresh option switched off for Facebook, yet it was still running for 3.4 hours in t