OnePlus 7 Pro Battery: Replacement Part BLP699 – iFixit

Replace the battery in your OnePlus 7 smartphone.

Fix issues like a swollen, aging or fast draining battery.

For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.