There are lots of things that can go wrong with your MacBook battery, but most are simply the result of the battery cycle count being too high. To check your battery cycle count: Launch Applications (⌘ + Shift + A) Utilities. Double-click on System Information. Under the Power category, find Cycle Count and Condition.

Learn how you can check MacBook Pro battery health, cycle count, charge capacity and see if you need to replace it or not.OS Catalina.FOLLOW US ON TWITTER: h

1. Check your MacBook battery health. Hold the Option key and click the Battery icon in your menu bar to see your MacBook battery condition. Apple classifies a battery as either Normal or Service Recommended, depending on how much charge it can hold compared to the number of cycles it has gone through. 4. Disable the keyboard backlight. To save your MacBook’s battery, turn off the keyboard light or set it at the minimum level. For this, use the keyboard brightness key on the top row of the built-in keyboard or the Touch Bar. Button on Touch Bar to decrease the keyboard backlight level. Scroll to the very bottom and click System Report…. On the left sidebar, click Power. You’ll find your battery cycle count under Health Information: Here’s how the process looks: On the left
The reason could be anything ranging from software issues to a bad battery. Sometimes apps and even your usage pattern determine MacBook battery life. Here is how you can check whether the MacBook battery is draining fast. Make a note of the battery level. Keep laptop open and check battery level after 30-40 minutes.
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how to check battery health on macbook air 2015