Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I've heard that at least initially, with any rechargeable-battery operated device, one should charge it up to 100%, then use it on battery until it drains completely.

Ever so often(once ever few months) i let my devices use the entire battery before charging them back up.

Conditioning isn't really needed anymore. In fact, running a battery such as those in phones or Macs down to 0 is actually BAD for the battery.

As for my opinion how how to best use the battery, use it on battery when needed, plugged in when not. Refer to my post here for the stats on the battery in my 2012: https://forums.macrumors.com/threads/battery-advice.2026884/#post-24182739
 
Ive been out of school for the past month (winter break) so I've had my MBP in clamshell mode and have been using an external display. I've had it plugged in 24/7 for around 3 weeks and it seems to be ok. Its designed to be used while its charging, so I wouldn't worry about it.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.