My keyboard will not charge beyond about 20% even though I leave it to charge for several hours.
It is still functioning via Bluetooth.
Looking at Bluetooth settings it shows up greyed out.
It is a fairly old keyboard, maybe 6 years old so perhaps the battery is failing.
Mac mini, macOS 12.6
Based on your description of the issue with your keyboard, chances are that the rechargeable lithium battery in it has reached its useful life.
Although it may be possible to replace this battery yourself, it is not a simple task. Primarily due the the difficulty of removing the back cover, which would have to be removed to access the keyboard's battery. Definitely not recommended, and a new keyboard may be the best solution going forward.
Based on your description of the issue with your keyboard, chances are that the rechargeable lithium battery in it has reached its useful life.
Although it may be possible to replace this battery yourself, it is not a simple task. Primarily due the the difficulty of removing the back cover, which would have to be removed to access the keyboard's battery. Definitely not recommended, and a new keyboard may be the best solution going forward.
Thank you. I think you are correct. I will not attempt to replace the battery. A new keyboard is the answer.
Magic Keyboard not charging
