Macbook power level always displaying as charging

[pulpadded]

My Macbook recently has started acting as if it's charging, as if the cable is attached, even when it isn't, so I always have battery with lightning bolt icon, the screen never dims, it never displays remaining power, etc.

 

[GGJstudios]

My Macbook recently has started acting as if it's charging, as if the cable is attached, even when it isn't, so I always have battery with lightning bolt icon, the screen never dims, it never displays remaining power, etc.

Try resetting the SMC.

This should answer most, if not all, of your battery questions:

Apple Notebook Battery FAQ​