Amazon.com: MFI-Apple Certified - ibattz Mojo Vogue Removable Battery Case for iPhone 4 and 4S White 1700mAhX2 fits all version of iPhone 4S/4 : Cell Phones & Accessories
After 10 years of faithful service, the battery in my 64GB iPhone 4s has finally become a spicy pillow. It was a good run. : r/spicypillows
Teardown of Apple's iPhone 4S reveals larger battery, new baseband chip | AppleInsider
Amazon.com: Winnerplusa Battery for iPhone 4 (3in 1) not Compatible with 4s : Cell Phones & Accessories
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