My 2021 MacBook Pro 16 inch battery drains even when it's shut down. anyone facing similar issues? like when I'm shutting down it will be like say 81% and when I turn it on it will be like 78%.
Does anyone experience this? Is it normal?
[Re-Titled by Moderator]
Original Title: Battery life
MacBook Pro 16″, macOS 26.1
A small drop like that is actually pretty normal, even when the MacBook is fully shut down. The system still uses a bit of power for things like maintaining the real-time clock and managing the battery. If the drop stays within a few percent overnight, it’s nothing to worry about. If you start seeing larger losses, resetting the SMC or checking for background startup items can help narrow it down.
A small drop like that is actually pretty normal, even when the MacBook is fully shut down. The system still uses a bit of power for things like maintaining the real-time clock and managing the battery. If the drop stays within a few percent overnight, it’s nothing to worry about. If you start seeing larger losses, resetting the SMC or checking for background startup items can help narrow it down.
Yes — a 2–4% battery drop after a full shutdown is normal on 2021 MacBook Pros due to Apple Silicon standby hardware, NVRAM/PMIC power retention, and background controllers that never fully power off.
But if it drains more than 5–8%, something needs fixing.
That computer is a battery-CAPABLE device, It is not optimized as a battery-operated device (it is not an iPhone.)
In general, you should ALWAYS connect a power source when it is possible to do so, and only run on batteries (which could be somewhat slower) when no power sources are at hand. Modern Macs maintain optimum battery charge levels under program control, and will NEVER over-charge. Connected to Power is NOT necessarily charging.
When you set it down in one place, or set it down for the night, Plug it in. Then you won’t CARE whether it would drain the battery.
Why is my 2021 MacBook Pro 16-inch battery draining when shut down?
