When I calibrate my battery, do I have to drain it all in one sitting?

I've read about battery calibrating and watched videos. I'm unclear about one thing.
When I drain the battery, is it okay if I do it in two seatings? Example, I started last night and didn't drain the entire battery so I let it sleep. This morning it's low. Can I resume where I left off or do I have to drain the battery in one sitting?
Also, the macbook pro is relatively new (actually, refurbished). I didn't calibrate when I first got the machine because I didn't know I was supposed to. Is it really that much of an issue if I am calibrating the battery after using for a few days?
Thank you!

You can resume where you left off. It makes no difference how many sessions it takes to deplete the battery, as long as you eventually do so and then let it rest at least five hours in that state before reconnecting the AC adapter. The most convenient time to leave it resting like that is generally while you're sleeping and the computer doesn't need to be used.
Not calibrating the battery immediately has no ill effects at all. The only reason to do it right away is to begin getting the most accurate battery readouts you can ASAP. You obviously haven't been concerned about that, so it's a non-issue. Do it when it's convenient for you.
Message was edited by: eww
Message was edited by: eww

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