Less than a year old MBP 13 Battery is now less than 89%

Question

My MBP is less than a year old. I check the battery and surprisingly, it has 534 cycles and only 89% Health left. I use iStat Pro. The battery is quite disappointing at only less than a year of use. Can I get it replaced under Applecare?

Answer 1

If you've cycled your battery 534 times in less than a year, you're flogging it within an inch of its life. Completely discharging and recharging your battery 1-1/2 times a day is as hard on it as anything you could possibly do to it, short of storing it in a closed parked car in the summer sun.
And still, after 53.4% of your rated 1000 cycles are gone, you've only lost 55% of the 1/5 of the battery's original Full charge Capacity that Apple expects you will lose in 1000 cycles. That is to say, despite your extremely hard usage of your battery, it's almost exactly on pace to meet Apple's stated expectation that it will still have 80% of its original Full Charge Capacity after 1000 cycles. Your disappointment is completely unwarranted, and you certainly have no reason to ask for or expect a replacement battery.
If you want it to last as long as possible, stop deep-discharging it every time you use it, and plug in your AC adapter whenever you can.