Check the Battery Life on a Mac
Check battery status To check your device's charge level, click the Control Center icon in the menu bar, then click Bluetooth. Or click the Bluetooth menu in the menu bar.
You can continue using it while it's charging. How do I know my Magic Keyboard is charging? Go to the Bluetooth settings on your computer and look for your device. You will see a percentage next to your keyboard if it is charging.
How Do I Know If My Magic Keyboard is Fully Charged?
Charging via a Magic Keyboard gives you 22 watts of charge power versus the tablet's native USB-C port which draws approximately 26 watts of power when charging the device. There are two ways to comment this. Firstly, you could whine about slower charge speed when using the Magic Keyboard.
A genuine Apple keyboard will have the Apple logo plastered right on the back of the keyboard, and you'll also noticed that it will have a cylindrical keyboard foot that not only props up the keyboard for comfortable typing, but also houses the two AA batteries to keep the keyboard going and going and going.
It takes only a few steps to check a Magic Keyboard's battery life on a PC.
When you connect your Apple Magic Keyboard, Magic Mouse 2, or Magic Trackpad 2 to your Mac, it automatically charges. Connect one end of a Lightning to USB Cable to your Magic Keyboard, Magic Mouse 2, or Magic Trackpad 2 and the other end to the USB port on your Mac.
The Lightning cable side goes into the keyboard. Plug the USB-C part of the cable to your PC or Mac. You can also plug it into a USB hub or other device with USB functionality to charge it. Your Magic Keyboard will now automatically charge while it's plugged in.
How Do I Check the Battery on My Magic Keyboard?
If you have exhausted the battery it could well take longer. After the two hour period it should run for about a month anyway so you could take out the charger after 2 hours.
When you connect your Apple Magic KeyboardApple Magic KeyboardMagic Keyboard delivers a remarkably comfortable and precise typing experience. It's also wireless and rechargeable, with an incredibly long-lasting internal battery that will power your keyboard for about a month or more between charges. ¹ It pairs automatically with your Mac, so you can get to work right away., Magic Mouse 2, or Magic Trackpad 2 to your Mac, it automatically charges. Connect one end of a Lightning to USB Cable to your Magic Keyboard, Magic Mouse 2, or Magic Trackpad 2 and the other end to the USB port on your Mac.
Use the bundled cable to charge the Magic Keyboard. Check the battery life remaining on your Mac or PC by checking your Bluetooth devices. The Magic Keyboard should last about a month between charges.
The sole purpose of the USB-C port is to allow you to power the iPad Pro while you're using it in a way that's both unobtrusive (the cable attaches at the rear corner of the keyboard, instead of hanging off the side of the iPad Pro), and leaves your main USB-C port free for other accessories.
With the Magic Keyboard, you can plug your charger into the USB-C barrel, and use the iPad's port to be used to connect peripherals like SD Card dongles, and more. The magic of this charging method is that the Magic Keyboard uses the Smart Connector pins to provide passthrough charging.
According to Twitter leaker L0vetodream, charging an iPad Pro via the Magic Keyboard's passthrough USB-C port is slower versus charging the tablet via its own native USB-C port.