The Battery Health button requires hardware support as well as being provided in macOS software. Older MacBooks do not have the hardware capability. For example, my MacBook 2016 with macOS 12 does not show Battery Health and does not support Optimised Charging. But you can find out about the battery health. The app coconutBattery does this

Choose any of the followings: Press and hold the Option key, and click the Apple menu and System Information, or. Click Apple menu > About This Mac > and click the Overview tab and then click the System Information button, or. Use Spotlight and search System Information, and lastly. On your Mac, go to Applications / Utilities / System

The one-year warranty includes replacement coverage for a defective battery. Apple offers a battery replacement service for all MacBook, MacBook Air and MacBook Pro notebooks with built-in batteries. As such, I'd say your level of wear is much higher than it should be considering you should be able to get to 1000 cycles with ~20% degradation.

Try performing each thrice. It may take sometime, being certain you have the time to perform these resets. B. Try a New Charger: Power & Cables - Mac Accessories - Apple - Select " Mac Compatibility " on the left. Find the Right Power Adapter and Cable for your Mac Notebook - Apple Support. C.

So rule of thumb I follow is, use the device on battery power when possible and if the battery gets below 30-40%, charge it to ~100% and unplug. If you really want to test and have a reference point then you can charge the unit to 100% restart the computer, then run the command “caffeinate -d”, this will prevent the computer from sleeping. Available in silver, space gray, and gold, the latest MacBook Air features a stunning Retina display with True Tone technology, Touch ID, a backlit Magic Keyboard, and a Force Touch trackpad—all housed in a thin and light iconic wedge design made from 100 percent recycled aluminum. . 376 197 102 374 391 339 385 381 318

how to check battery health on macbook air 2015