More power for the Galaxy S3 with Mugen Power 4,600 mAh extended battery
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Amazon.com: Galaxy S3 Battery, AceSoft 7300mAh Extended Replacement Battery for Samsung Galaxy SIII with TPU Back Cover Case : Cell Phones & Accessories
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Ciszean 1x 3500mah Eb-f1m7flu Extended Battery + Back Cover +universal Dock Charger For Samsung Galaxy S3 Mini S3 Mini I8190 - Mobile Phone Batteries - AliExpress
Newest 3200mAh Ultra Slim Rechargeable Extended Battery Case for Samsung Galaxy S3 with Kickstand (Black) - Walmart.com
Official Samsung Galaxy S3 Extended Battery Kit - 3000mAh - Blue
Genuine Samsung Extended Battery Kit for Galaxy S3 - 3000mAh - Black