TIL you can see your battery's health with the official OnePlus Diagnostic app : r/oneplus
OriginaI BLP657 Battery for Oneplus 6 / A6000 /A6003 / Oneplus Six One Plus 6 One+6 1+6 (3300 mAh) : Amazon.in: Electronics
Replacement for OnePlus 5 Battery 3210mAh
Original 2525mAh One Plus X BLP607 Replacement Battery Bateria Batterij For OnePlus X E1001 Cell Mobile Phone Batteries|Mobile Phone Batteries| - AliExpress
OnePlus 3 Teardown Part I: Battery Replacement - SlashGear
Replacement for OnePlus 5T Battery
Mobile Phone Battery BLP743 for OnePlus 7/7T pro OnePlus 8 pro OnePlus 6T for One Plus 1+ 6T 7T 7 8 pro Battery Batterij - AliExpress Cellphones & Telecommunications
Original Replacement Battery Blp759 For Oneplus 9 9pro 8pro 8 8t One Plus Nord N10 N100 1+ 8 9 Pro Blp815 Genuine Phone Battery - Mobile Phone Batteries - AliExpress