Once that 80% threshold hits, the Mac will pop up a “Service Battery” warning in its menu bar, to let you know that its time is through. This warning will appear when your MacBook battery’s maximum charge capacity drops below 80%. It’s important to emphasize “on average,” because some MacBook Pro batteries will fail well before they reach that age.

Eventually the battery will hold 80% or less of its original capacity – Apple estimates that to take about 1,000 charge cycles on these particular MacBook Pro models, on average. As they get used, their charge capacity diminish. MacBook Pro batteries wear out over time, the same as any other battery. How to know if your MacBook Pro battery needs to be replaced How to know if your battery needs replacing.

If you have any of these computers, you should be able to follow along the same steps: These battery replacement instructions are the same for a variety of different 13-inch MacBook Pro models. My little 13-inch MacBook Pro is good to go for a while longer, and what’s more, it’s working faster and even more capable than it was the day it left the factory. Now it has a brand new battery, 16 GB RAM and a 480 GB Solid State Drive (SSD) instead. When it came to me it was equipped with the original factory battery, 4 GB RAM, and a dead 500 GB spinning hard drive. I’ve been rehabbing a 13-inch MacBook Pro (Mid-2012) that works with macOS 10.15 Catalina and it runs all the software I need to do my work on. This tutorial covers the process for replacing the batteries in those older Mac laptops. MacBook Airs, Retina display-equipped MacBook Pros, and the newer, albeit discontinued MacBooks all have tightly integrated batteries that are glued in, making their removal and replacement very time-consuming and difficult. Older MacBook Pro models, like 13-inch and 15-inch MacBook Pros that predate the Retina display, are very easy to work on. This tutorial will step you through the process of figuring out if your MacBook Pro needs its battery replaced, and if so, how to replace it. Fortunately many older MacBook Pros have batteries that can be replaced with very little trouble. Over time, their charge capacity diminishes because they wear out. The batteries in Mac laptops are consumable items.

Macbook pro mid 2009 13 inch battery