Before starting, make sure your device is completely powered off and unplugged. Use the proper tools if needed (usually included in the package). Do not force anything—if you're unsure, seek help from a professional.
This tutorial will guide you in detail how to remove the Apple A1321 / MacBook Pro 15" Unibody (Mid 2009-Mid 2010) / A1286 (EMC 2324/2325/2353) battery.
Step 2
Remove the three screws securing the battery.
Step 3
Disconnect the battery connector and slightly bend the cable to prevent accidental reconnection during operation.
Step 4
- Use the attached plastic pull tab to lift the battery from the upper case.
- Reinstall it by following the steps in reverse.
Note: If you notice any unusual problems after installing your new battery, you may need to reset your MacBook's SMC.