Following up on the macOS Monterey 12.2 battery drain story, in which a number of users have cited severe overnight MacBook battery drain, a workaround has been found:
Developer João Pavão tweeted a RADAR report for the bug:
While Apple hasn’t yet issued a fix, there is at least a clunky workaround: Switch off Bluetooth before you put the machine to sleep, and re-enable it when you wake the machine.
Of course, if you use the machine in clamshell mode with Magic Keyboard/Trackpad/Mouse, you’ll need to open it first to re-enable Bluetooth using the built-in trackpad.
It’s not the most elegant solution, but if it works until a patch is delivered, you can’t knock it.
Stay tuned for additional details as they become available.
Via 9to5Mac and @joaopavao