iOS 8 on the iPhone 4S: Performance isn't the (only) problem | Ars Technica
Make iOS Alert You When Your iPhone Only Has 5% Battery Life Remaining « iOS & iPhone :: Gadget Hacks
Discussion] Apple is showing their new phones off today, and I'm here with my iPhone 5 on iOS 6 and couldn't be happier... : r/LegacyJailbreak
My iPhone went dead! How do I fix it? - AppleToolBox
How to Fix iOS 8.1 Battery Life
Why your iPhone battery meter sometimes goes haywire
iOS 8 iPhone 4S battery life is HORRIBLE | MacRumors Forums
iOS 8 on iPhone 4s: First Impressions and Performance
Looking inside an iPhone 4/4S battery | Rip It Apart - Jason's electronics blog-thingy
Help] iPhone 4s 32gb iOS 8 Jailbroken after restart automatically set it time to the epoch and disabled, Is there any way to unlock it wothout losing data? : r/jailbreak
How to Fix iOS 8.1 Battery Life
Read this before upgrading your iPhone 4s to iOS 8
Looking inside an iPhone 4/4S battery | Rip It Apart - Jason's electronics blog-thingy