iFixit's video walkthrough details DIY iPhone 5 battery replacement process
Here's the Real Reason Apple Doesn't Want You to Replace the Battery in Your iPhone on Your Own | Inc.com
ZMNT (4000mAh) Battery for iPhone 6s(2022 New Version),(Model: A1633 A1688 A1700) Replacement Battery with High Capacity for iPhone 6s with Full Remove Repair Tool Kit.6q