A number of users are experiencing overnight battery drain on MacBooks in macOS 12.2, and this turns out to be due to a Bluetooth bug that continually wakes the machine from sleep. The bug affects both Intel and M1 MacBook Air and MacBook Pro machines.
In summary, without knowing the symptoms, we will assume that your diagnostic is correct, that the battery is bad, in which case you can replace your battery or top case without losing your data. The long answer: The mother board has on it the CPU and storage (SSD).
Click and select the “Require Password” check box. Select “Immediately” from the pull-down options list to lock the Mac as soon as you close the device. Alternatively, select “After Sleep or Screen Saver Begins” to delay the lock until the Mac goes into sleep or screen saver mode.
It's not normal to lose 10-15% of charge overnight with no usage. Most of the time my Mac woke up with the same charge % as when it went to sleep the night before. I stand corrected re Power Nap, it seems to be behave like “Power Nap” on AS, and the only way to disable it is via pmset.
If you turn on iCloud Backups it only backs up once a day, and only when the phone is plugged in, connected to Wi-Fi and the screen is locked. So it does not put any load on the battery; it actually backs up while the phone is charging and otherwise idle, and will have no effect on battery life.
Lithium-Ion batteries suffer in extremely cold temperatures: According to Battery University, cold temperature “increases the internal resistance and diminishes the capacity” of a Li-ion battery. Specifically, they estimate that at -18 degrees Celcius a Li-ion may only deliver 50% of its capacity.
You can keep your screen on when your laptop is closed by altering the laptop's power settings. In Windows, open the Control Panel and go to Power Options to set what happens when the lid is closed. If you have a Mac, open System Preferences and go to the Power Adapter section of the Battery preferences.
One thing we must understand is that the battery of a laptop does not store charge forever. The battery will drain even if the laptop is shut down. But this drainage will be so minimal that we don't feel it unless we keep the laptop shut down for a long period of time.
Tip: If an app has windows open when you quit the app, the windows are shown the next time you open the app. To have app windows close and not be shown the next time you open apps, choose Apple menu > System Preferences, click General , then select “Close windows when quitting an app.”
Apparently 5% loss within 24 hours and 1-2% per day thereafter is expected for Lithium batteries. Yours is definitely draining at a much higher rate.
Yes, your AirPods will lose battery power when not in the case. Your battery drainage will occur naturally as if the AirPods are still in usage but in low power mode. This is largely based on the fact that the AirPods enter a low power while the proximity sensor remains active.
Usually, it means that your phone is detecting a cable plugged in but no power is being sent to the phone battery. Or, perhaps the phone battery is rejecting the battery charge. The reasons could range anywhere from a charger problem, to a charging port problem or even a bad phone.