How to Get a Battery Replacement For Your Aging Smartphone | WIRED
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iPhone Battery and Performance - Apple Support (CA)
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How to Replace iPhone 4 and iPhone 4S Battery: EveryiPhone.com
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iPhone 4 Battery Replacement - iFixit Repair Guide
How to replace your iPhone's dying battery — and whether it's worth it - 9to5Mac
How To Easily Remove, Install & Replace an Apple iPhone 4S Battery - YouTube
How to Replace iPhone 4 Battery - fynd
