Batteries, to plug or not to plug?

Was wondering if anyone here could tell me. When using your m18x at home is it better
To keep it plugged in or not? Ive been told that its a good idea to take the battery
Out on some laptops to avoid overheating it and wearing down its life. Is this a problem with
The m18x or does it matter because of the triple cooling fans?
Any advice would help. Thanks.