![](https://kazulog.fun/wp-content/uploads/2024/06/macbook-pro-battery-752x423.png)
Does the MacBook Pro battery degrade when left fully charged and connected to a power source?
Conclusion, leaving the power on is not a problem. However, if you are using a Mac with an Apple silicon processor released from late 2020 instead of an Intel Mac, and if you have set Battery Charge Optimisation to ON (it is ON by default) in the battery settings as described below.