In order to make sure that your Mac’s battery life is going to be as long as possible,there are two things you need to do whenever you lay your hands on your new Mac.First of all,make sure to set yourself a reminder to notify you of the expiration of its One-Year Warranty or AppleCare.It is also a good idea to set a regular reminder to tell you to check your battery’s usage time,that has to be done at minimum once to two-to-three weeks before the warranty of AppleCare expiration.The most important thing here is to catch battery issues before the warranty expires,so you’d still have a chance to get those problems fixed,because the service might be free.

Second step is to calibrate your Mac’s battery when it’s brand new and measure initial usage time;you may write it down somewhere.This will be a point of reference as your Mac ages.Over time,the accuracy of your battery’s internal gauge gets out-of-sync with the battery’s actual capacity and that is why recalibration is necessary in order for you to track the battery’s charge.
Apple suggests you calibrate your Mac’s battery when it’s brand new and then once every few months thereafter.Here are simple steps to accomplish calibration:
- Step 1: Charge to full capacity.
- Step 2: Use battery in fully charged state.
- Step 3: Disconnect from power adapter and continue use.
- Step 4: Continue use until Mac shuts itself off.
- Step 5: Let Mac sit for about 30 minutes to an hour (some say longer).
- Step 6: Recharge again to full capacity. The charge should be uninterrupted.
In case you need assistance with calibration,Apple has it’s own site on battery calibration,where you can find step-by-step guides.
Maximizing Your Battery’s Life: Battery Care During Your Mac’s Life
Following a few simple rules will make taking care of your Mac’s battery really easy.First,makes sure to recalibrate your Mac’s battery every other month.Doing this is so important,that Apple offers pre-made iCal reminders on it’s battery care page.
Second,make your battery work regularly.Don’t let it sit around completely full or empty.It’s not a good idea to have your Mac plugged in 27/7,because when plugged in,your battery is constantly staying in a charged state,in this case,it is exposed to a higher voltage level,and that may stress the battery.
If your battery is put under stress it will age quicker,than it otherwise would.Same as overcharging the battery,deep discharging also stresses the battery and may even lead it to a failure.The way your battery is made requires regular usage in order to maximize it’s life.
Third,don’t expose your battery to extreme temperatures.The best temperature for your Mac’s battery to function properly is approximately 68°F(room temperature).Extremely hot or cold temperature stresses your battery and reduces it’s life.Don’t leave your Mac in a car on a cold winter night or hot summer day.Likewise,make sure your battery is not overheated while working or charging.
Fourth,you should store your battery properly.A stored battery will continue to age inevitably.But there is a way to minimize and slow down the aging process by following two simple rules – store your battery at approximately 40% capacity – this charge level will ensure that age-related capacity loss is minimized.Also,keep it in a cool(59°F or less) and dry place.