New battery for macbook pro m1 chip 2020

Typically there will be a "Service Recommended" message in the battery status, but the most common reason is when the battery health has dropped below 80% of nominal new. It could also happen if a battery fault is logged. I had that happen when the battery management system was corrupted (it was reporting negative battery capacity).

Here you go: Check the condition of your Mac notebook’s battery - Apple Support

When the battery does not perform to your needs. This will occur sometime after the Battery Condition becomes "Service Recommended".