Check Battery Cycle Count on a Mac
If you have a MacBook, MacBook Air, or MacBook Pro, you can check the battery cycle count to get an idea of overall battery health.
- Launch Apple System Profiler (called System Information in Lion) either through /Applications/Utilities/ or by going to “About this Mac” and selecting “More Info”
- Under Hardware, select “Power”
- Look for “Cycle Count” under the ‘Battery Information’ portion
Now that you have this information, let’s make some sense of it.
What is a Battery Cycle?
A battery charge cycle is when the battery has been drained to 0% and then refilled to 100% of it’s maximum capacity, it is not every time you plug your MacBook to the power adapter.
Why Do Battery Cycle Counts Matter?
Knowing the cycle count is helpful if you suspect your battery is having problems retaining a charge. Apple says new notebook batteries are designed to retain 80% of original capacity after 1000 cycles. If your battery is performing at less than expected and is still under warranty, it may be a good idea to schedule an appointment with an Apple Genius.
Tracking Battery Cycles and Health Over Time
Using a free utility like CoconutBattery allows you to keep track of your batteries health by saving data points like cycle count and charge capacity.
If you just want to see how much battery life you have left on your current charge, you can show that in the battery menubar.