A charge cycle means using all of the battery's power, but that doesn't necessarily mean a single charge.

Use of your MacBook battery is counted in the form of charge cycles. How to access information about your Mac battery: If your battery is listed as anything except, Condition: Normal, then you should replace your battery. The condition rating can be 'Normal', 'Replace Soon', 'Replace Now', or 'Service Battery'. Click on the Power section in the list and you’ll find information like the cycle count and condition rating. This is located in Applications > Utilities and can also be accessed by going to the Apple menu > About This Mac > More Info. The fastest way to check if your MacBook is in need of a new battery is to open System Profiler. Looking for iPhone battery replacements? How to tell if you need a new Mac battery The battery in a MacBook, whether it's a MacBook Pro or Air, can be replaced with a new model and many more years use can be had. They are not designed to be replaceable by members of the public, which makes some people think that they are not replaceable at all. The issue comes when it is time to replace the battery. There is nothing that anybody can do to prevent that. But, the battery life will get worse over time. It's normal for MacBook Air users to get 12 hours on a single charge, and MacBook Pro users should get several hours, even if the laptop is a few years old. The battery life of an Apple MacBook is something that PC laptop users dream about.

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