How to Replace a MacBook Battery

MacBook batteries degrade over time, reducing runtime and performance. Replacing the battery restores your laptop's portability and can extend its lifespan by several years.

1. Power down and prepare your workspace. Shut down your MacBook completely and unplug the power adapter. Wait at least 10 minutes for internal components to cool. Set up a clean, well-lit workspace with an anti-static mat if available.
2. Gather the required tools. You need a P5 Pentalobe screwdriver for the bottom case, Phillips #00 screwdriver for internal screws, plastic prying tools, and tweezers. For newer models, you may also need a T5 Torx screwdriver and adhesive strips.
3. Remove the bottom case. Flip your MacBook over and remove the 10 Pentalobe screws securing the bottom case. Note that some screws may be different lengths. Gently lift the case starting from the front edge near the trackpad.
4. Disconnect the battery. Locate the battery connector cable near the center of the logic board. Use a plastic tool to gently lift the connector straight up from its socket. This prevents electrical shorts during the replacement process.
5. Remove adhesive strips and screws. Remove the Phillips screws holding the battery in place — typically 5-8 screws depending on your model. Slowly pull the adhesive strips at a 180-degree angle to release the battery from the case. If strips break, use isopropyl alcohol to soften the remaining adhesive.
6. Install the new battery. Place the replacement battery in the case, ensuring proper alignment with screw holes. Apply new adhesive strips if included with your replacement battery. Secure the battery with the original Phillips screws in their exact original positions.
7. Reconnect and test. Reconnect the battery cable by pressing it firmly into its socket until it clicks. Replace the bottom case and secure with Pentalobe screws. Power on your MacBook and check System Information to verify the new battery is recognized with zero cycle count.