Amazon.com: Replacement Battery BLP699 Compatible with Oneplus 7 Oneplus 7 Pro GM1910 GM1913 with Tools : Cell Phones & Accessories
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%
Replacement Battery BLP685 For OnePlus 7 GM1900 Tool - Walmart.com
OnePlus 7 Pro in teardown video: battery replacement made easy | NextPit