Apple hardware looks very nice thanks to a minimalistic and sleek design. But at the same time you will search in vain for a simple indicator on, for example, your wireless mouse or keyboard of your Mac...
The iMac comes standard with a wireless mouse and keyboard. Its built-in batteries provide energy for months when fully charged. And basically, macOS notifies you when it's time to charge one or both devices. Only you will always see that this happens at a time when you really don't have time. Now that's no problem with the keyboard, you can just use it while charging. It is very different with the Magic Mouse 2. The Lightning connection - intended for charging the mouse - is located at the bottom. In short: if you want to charge that thing, the device is not usable. So you would rather avoid an (almost) empty mouse battery. The only difference is that there is no LED on the mouse that - if only for a moment - indicates the state of charge. Fortunately, the remaining battery charge can be checked manually. In the case of the mouse, you do this by clicking on the apple in the menu bar. Then click System Preferences and then on Mouse. In the window that is now standing in front of you, you will see the text Battery level followed by a percentage at the bottom left. In our example, the battery has just been charged and can therefore last quite a while. it is important to check the battery of the mouse every now and then - even if only once a month. This prevents an essential operating component from shutting down at a critical moment.
Keyboard
You can check the remaining battery charge of your keyboard in System Preferences on Keyboard to click. Here too you will now see the remaining battery capacity in the bottom left of the window. In the case of the keyboard, you can also wait for a system message regarding the fact that charging is required. You can do that via the included Lightning cable and still use the keyboard at the same time.
Other mice
In the unlikely event that you are confronted with a flat battery in the mouse, it is good to know that the vast majority of standard USB mice work with the Mac and macOS. Installing drivers isn't usually necessary unless you have a mouse with special perks for which a Mac driver is available. But even then, the basic functions will also work fine without drivers. So it's not a bad idea in itself to have a wired standard USB mouse somewhere in a shoebox. The same also applies to keyboards. In an emergency, even a standard Windows keyboard will work. You just have to figure out which buttons act as Command, Option and Control. Matter of trying, usually it is Ctrl, Windows and Alt that observe these tasks. Not ideal in any case, but if the need is high, rescue is fortunately close at hand. That ancient cord sometimes turns out not to be so crazy!
