Oneplus 7Pro) After 3 years I finally replaced my back and battery!! Total $25. It was tough but really fun process to do. Took about 30minutes. The battery health was around 78%
OnePlus 3 Teardown: Easy to disassemble, reassemble with its cool and solid design - Android Community
OnePlus 3 - Battery limited to 2500mah instead of the original 3000mah? German Article : r/oneplus