Replace Battery BLP685 For OnePlus 6T OnePlus 7 One Plus 6T One Plus 7 3700mAh | eBay
OnePlus 6T Review: Still the Value Buy
Im so glad I replaced the battery on my 3+yr old Oneplus 6T. I could probably use it another 3yrs. Take it to a local shop if you dont diy : r/ oneplus