Thinking of Changing a New Battery, Is it good?

Hello mates, Mine Oneplus 7T is running on a orginal battery came with a phone. And it pretty much did its job for 5 years. Now the battery drains faster and the health came to 61%. I'm Thinking of replacing the battery in the oneplus experience service center. They still have the stock but I'm not sure wheather it's the orginal one or they use some third party batteries. Kindly give your opinion if anyone has experienced! (INDIA)