Currently Being ModeratedJan 23, 2014 6:11 PM (in response to Carllooss)
You never want to run it down to 0 if you can help it. My advice would be to just use it normally. Run it on battery when you're at class or whatever and plug in and run off AC when you're home. I've been using my current MBP for 3 1/2 years this way and the battery is still fine.
Currently Being ModeratedJan 23, 2014 6:12 PM (in response to Carllooss)
The best practice is to only discharge the battery half way and then recharge..studies show that will give three to four times the life of a battery discharged to shutdown regularly.
You can leave it plugged in since the charging circuit shutsdown when the battery is fully charged and then restarts when the charge level drops to 93-95% to top up the battery. Take it off the charger at least monthly to exercise it and discharge half way.