OnePlus 7T Pro Original Battery Replacement Instructions:

• Charge the battery for at least 3 hours before using it for the first time.
• Please use the original charger or professional battery charger.
• Don’t place your battery near a heat source. Excessive heat can damage the phone battery, the battery could become very hot.
• Always charge the battery at near room temperature(0°-45°)
• Do not disassemble or modify the battery for any other purpose.
• Do not expose the battery to liquid or subject to strong mechanical shocks.
• Do not charge the battery for more than 24 hours.