My DIY iPhone Battery Replacement Was Easy. Here's What I Did. - CNET
How to replace battery on iPhone 4 and iPhone 4s | Quality Cellular
Apple Iphone 4 & 4S BATTERY REPLACEMENT. Step by step full guide. - YouTube
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Official iPhone 4 / 4S Battery Replacement Video & Instructions - iCracked.com - YouTube
How to Easily Replace an iPhone 4 Battery - YouTube