Hi, Max
Sorry for being tardy with my reply; I've been a bit under the weather. "It's baaack!" (just when you thought it was safe to go in the water) is a quote from
Jaws, right?
I can understand and appreciate your skepticism. Although I've adopted (and intend to maintain) a positive, "can-do" attitude toward Bluetooth, it can be difficult to soothe the anxiety you're experiencing.
I'll share what I do when I get the "low-battery" alert. Nothing beyond simplicity, but it works for me:
(1) I keep working for a while. There's no rush.
(2) I plug-in my USB mouse (if it's not already attached and waiting in a drawer).
(3) I replace batteries, using care with both polarity and seating. While I'm inside the mouse, I check the metal components, etc.
(4) I replace the mouse's bottom, and close the LED cover. Yes, leaving the mouse "off."
(5) I go to System Preferences via the Bluetooth menu's "Set up Bluetooth Device" (other paths are the same; this is quickest for me),
(6) I continue past the 1st screen, and select "Mouse,"
(7) While it's searching for a mouse, I open the LED cover and turn my mouse belly-up near the computer.
(8) I wait
very patiently. Actually, I keep working, using the USB mouse. It usually takes a little while, and it almost always works. When it hasn't, I repeat the "find my mouse" routine and it works.
I think "off" and patience are key.
Lest anyone jump in to decry the USB backup: Article 86477:
Apple Wireless Keyboard and Mouse: System Requirements does say,
]"To use the Apple Wireless Keyboard or Apple Wireless Mouse you will need:. . . A USB keyboard and mouse for setup."
[Not exactly in bold print on the side of the box, but...] I consider keeping them handy a "must." Irony? Not to me: my "last" Mac (a Power Mac 6500, still going strong) predated USB, so I had to add it via a PCI card; thus, I had to keep ADB mouse & keyboard handy for certain situations. I just think of this as a "sidekick of progress." Hah.
I hope this helps, even as simple as it is.
Btw, please
do call AppleCare. Three reasons:
(a) They're very good. And troubleshooting Bluetooth irritations is more of an interactive process than is readily amenable to other formats
(b) It's a very good thing to have an open case number, just in case you need it later.
(c) They've told me that there are comparatively
very few Bluetooth-related calls when I've remarked that quite a few folks post here about xyz. One-on-one feedback eventually filters through to the engineers.
Best of luck, Max!
Dean