How to treat the battery health of one plus nine 9pro?

Battery life can be viewed on Ann Bunny. If the health of the battery is about 70%, it means that the battery is aging and needs to be replaced.

Mobile phone batteries can last about three years. Adhere to the designer's design life is generally around 500 cycles. When the battery is charged to 500 cycles, the life of the battery will also reach the end. Batteries are consumables. After aging, it can only be replaced and cannot be repaired.