My DIY iPhone Battery Replacement Was Easy. Here's What I Did. - CNET
Amazon.com: High Capacity Compatible with iPhone 6S Plus (5.5") Battery Replacement, Upgraded Battery for iPhone 6S Plus A1634 A1687 A1699 with Professional Repair Tools Set : Cell Phones & Accessories
Amazon.com: TAYUZH [5000mAh] Battery for iPhone 6S Plus High Capacity New 0 Cycle Replacement Battery for iPhone 6S Plus A1634 A1687 A1699 with Installation Manual and Professional Repair Tools Kits : Cell
How to Remove Battery from iPhone 6 or 6 Plus
Replace the Battery of iPhone SE/6S Plus/6S/6 Plus/6/5S/5C/5- Dr.Fone