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Amazon.com: IBESTWIN 3.8V 1440mAh Replacement Battery for iPhone 5 A1428, A1429 and A1442 with Replacement Tool Kits, Adhesive Strip (Not for IP 5S or 5C)-3 Years Warranty : Cell Phones & Accessories
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Why does my iPhone 5s battery suddenly drop from 43% to 20% and then 10% suddenly? Is this battery to be replaced or is there something other malfunctioning? - Quora
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