should I leave my macbook pro plugged in all the time?
will leaving macbook pro plugged in all the time make the battery last longer?
No. You may leave it connected to AC for most of the time, BUT at least once per month, use the MBP under battery power to about the 40% charge level. The you may recharge to 100%. Lithium ion batteries require periodic 'exercise' for long battery life.
Ciao.