[m i k e]

I just received a new battery under warranty from Apple because I just got a my MBP a few weeks ago and it's battery health was getting prematurely low. I have not installed it yet. So what is the proper way to care for a new battery? Should I use the charge it has already in it to its completion and then recharge? Should I immediately charge it to full and then let it drain to zero and recharge? Then after this first cycle how should I be using the battery to keep it working well for as long as possible? Thanks for any help.

[JoshuaZ]

In general, plug it in as much as possible.

As to the other things, well, it clearly won't hurt the batter if you charge it up and run it down the first time.

[Simon]

Calibrate the battery as indicated in your MBP's user manual (page 24).

Then use it as you like. Just keep in mind that the battery prefers to be used across its entire capacity range than just in the top 5%.