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theguardian.com - 29 readers - Testing reveals Facebook iOS app drains battery life, even when it isn’t being used, and that using Safari instead will make an iPhone last longer
lifehacker.com - 20 readers - In iOS 8, Apple allowed apps to run in the background so they can stay up to date without you opening them. This tends to kill the battery life, but thankfully you can easily turn the feature off. However, doing that for the Facebook app doesn’t seem to make a difference.