Service Battery Warning on Mac – Do You Need to Replace the Battery?

One of the most dreaded alerts a MacBook user can ever see is the one that says Service Battery.

As with all laptop computers, the battery is one of the most critical and expensive components, and it is also a component that essentially cannot be serviced, which is ironic given the wording of the alert itself suggesting that the user “service” the battery.

When a lithium-ion battery is done, it’s done, and when that happens you either need to replace the battery or you need to keep your MacBook plugged in at all times, which kind of defeats the purpose of having a laptop in the first place.

What exactly are your options when your MacBook returns the Service Battery warning? In this article, I will explain how the lithium-ion batteries in your MacBook work, how to get the best performance and longest life out of your battery, and I will give you some suggestions on ways to resolve the Service Battery alert that does not require you to pay a lot of money for a new battery pack.

How Lithium-Ion Batteries Work

All chemical batteries work on the same basic principle: a positive electrode (cathode) is separated from a negative electrode (anode) by a solution called an electrolyte.

When the battery is connected to an electrical circuit that draws power, electrons flow from the anode to the cathode, creating a current.

There will be a test on this later. The results will go on your permanent record.

If a battery is rechargeable, then this flow can be reversed. When a current is sent into the battery, electrons flow from the positive to the negative electrode, recharging the battery and adding power to it.

In a lithium-ion battery, the positive electrode is usually made out of lithium-cobalt oxide (LiCoO2). Newer batteries use lithium iron phosphate (LiFePO4) instead.

You have undoubtedly heard news stories about lithium batteries exploding or catching fire. Those stories are true; this type of battery is subject to overheating and exploding if they are not carefully monitored. As battery technology has developed, this problem has been more or less eliminated by the addition of electronic monitoring circuitry added to a battery. Of course, knowing the dangers of a swollen battery are important to your safety and electronic devices.

This circuitry keeps an (electronic) eye on the discharge rate of the battery. If something goes awry (usually a runaway discharge), the circuit shuts down the connection between the anode and cathode and stops the reaction in its tracks. When the reaction’s shut down, the battery won’t catch on fire or explode. So consider this a safety feature not to mention protecting the MacBook itself.

There are many variations on this basic battery design, with different designs producing different power outputs, reliability levels, and so on. The main factor we are looking at today is the charging life cycle of the battery; that is, how many times can the battery be discharged and then recharged before it no longer functions at full capacity.

The cathode slowly degrades over time as its molecules keep getting put through the wringer, and eventually, the battery reaches a point where it stops holding as much of a charge, and then eventually it will not hold a charge at all.

For lithium-ion batteries, the number of cycles before this happens varies widely depending on the quality of the battery build and the level of discharge that the battery supports.

What To Expect from MacBook Batteries

The batteries in your MacBook follow the same physical laws as all the other applications for lithium-ion batteries. Laptops don’t draw a lot of power and are generally designed to optimize their power consumption.

Even with those two facts in mind, a typical recent MacBook or MacBook Pro can run for about 10 hours of using the Internet and doing normal computing tasks like word processing or playing music.

The battery life will be shorter if you are doing intensive work like calculating pi or doing chemistry equations. Older MacBook models generally run for about 8 hours on the battery.

How long can you expect that level of performance from your battery? That is, what is your MacBook’s battery life?

Apple states that its new batteries are designed to support 1,000 full charge-discharge cycles, after which the battery should still have 80% or more of its original capacity.

Note that even after this long life-cycle (a complete discharge and recharge every day for three years), your battery will still work – it just won’t have the same ability to hold a charge as it did at the peak. It will continue to degrade slowly over time and will eventually stop working altogether, but that can be years after it reaches its nominal end of life.

Note that the macOS is quite intelligent when calculating cycles. Partial charges do not count as a complete cycle; if you discharge your battery a bit and then charge it back up, that will only count as a fraction of a cycle for its internal monitoring.

How Do I Know if My MacBook Battery Needs to be Replaced?

Your MacBook monitors the health of its battery, using its original capability as a base. If you mouse over your battery icon on the status bar at the top of your screen, a popup will display the battery status, the amount of power remaining, and a list of apps that are using a lot of power.

There are four battery status messages:

  • Normal – This battery status means that your battery is operating within normal parameters and is basically “like new”
  • Replace Soon – The battery is holding less of a charge than it did when it was new, but is still working fine.
  • Replace Now – The battery still works normally but has significantly less ability to hold a charge than when it was new. It’s time to start looking for a new battery.
  • Service BatteryThere is something wrong with the battery’s function. It may still be working, and you won’t hurt your computer by continuing to use it, but the battery may not hold a charge for long at all.

What Should I Do When My Mac Says Service Battery?

As noted above, “Service Battey” means something is wrong with the battery. The first thing you should do when you get a “Service Battery” notification is to check the System Report. This will tell you the cycle count and overall condition of your MacBook battery. To view the System Report:

  1. Select the Apple Menu (the Apple icon in the top left of your computer)
  2. Make sure you are on the Overview tab
  3. Next, click About This Mac
  4. Then click on the System Report
  5. In the left-hand menu, click Power.
  6. Under Battery Information on the right-hand side, look for the Cycle Count under “Health Information.”
  7. Also, look at the Condition of your battery (indicated directly below Cycle Count), which should be Normal if your battery’s operating properly.

Modern Macs get at least 1,000 cycles before there’s a problem, though if you have a Macbook that’s older than 2010 then you may only have 500 cycles available before your battery’s worn out.

How Do I Change Low Battery Warning on My MacBook?

If you get the Service Battery warning, the cycles are above about 1,000 for a newer Mac (post-2010) or about 500 for a pre-2010 Mac, then your battery’s likely pretty close to worn out.

But if your cycles are relatively low, then there may be other issues at play and you should use the methods I’m about to describe. I’ll show you how you can attempt to resolve the issue yourself before you spending replacing the battery outright.

Reset SMC to stop Service Battery Warnings On Your MacBook

The first thing to try is resetting your System Management Controller (SMC), which is a hardware chip that controls some hardware settings, including the power system.

While very reliable, it can occasionally have issues that require a reset. The process is straightforward, but any customizations to your power plans or hardware settings may also be reset.

Here’s how to reset the SMC:

  1. Shut down your MacBook.
  2. Press left Shift+Ctrl+Option+the power button at the same time and hold.
  3. Release all keys at the same time.
  4. Turn on the laptop.

SMC controls the computer fans, backlights, and indicator lights, as well as some aspects of the display, ports, and battery, so resetting it will force your MacBook to revert back to its default settings for all these things. I

If a transient issue in the SMC was causing the Service Battery warning, this should address it.

Recalibrate Your MacBook Battery

The next thing to try is to recalibrate the battery. Recalibrating the battery basically means discharging it completely (something that most of us rarely do) and then recharging it completely so that the battery management circuitry inside your MacBook has a chance to see the entire range of possible charge in the battery.

Battery recalibration takes a day or so, so if possible, do it over a weekend when you don’t have to have your MacBook for work.

Here’s how to recalibrate your MacBook’s battery:

  1. Fully charge your MacBook to 100% – until the MagSafe light ring goes green or the drop-down from the battery icon indicates that your MacBook is fully charged. Note: Click on the battery icon in the upper-right and select “Battery Percentage” from the pull-down menu for easier battery percentage monitoring.
    Show battery percentage on Macbook
  2. Keep the laptop running while connected to the power supply for a couple of hours.
  3. Unplug the MacBook from the power supply, but leave it running. You can use it normally, or just leave it on. Run processor-intensive programs to speed up the process if you wish.
  4. When you see the low battery warning, save any work you are doing before the battery runs completely down.
  5. Allow the MacBook to run until it shuts down due to a lack of power.
  6. Leave your MacBook overnight without the power cord connected.
  7. Then, the next morning, plug your Macbook in and charge it to 100% power again.

Your MacBook should now be able to more accurately gauge the battery status. If this clears up whatever the problem was, your Service Battery warning should go away.

In addition, you’ll notice that the macOS battery indicator now gives a more accurate reading of the battery’s status – no more surprise losses of power.

Other Ways to Address the Service Battery Warning on Mac

If your battery is still well within its theoretical cycle count and you have tried both calibrating it and resetting the SMC and the Service Battery warning still appears, you only have one option left: take it to an Apple Store.

If it’s been less than a year since you bought your MacBook, you should still be under the warranty. However, after that point (unless you are under AppleCare and within the three-year extended warranty period) then a battery replacement will cost $129 or more.

How to Extend Your Mac’s Battery Life

If you plan to keep your MacBook in service for a long time, then keeping your battery in top condition ought to be a priority.

It’s the component that is the most likely to go out and need a replacement. Here are some suggestions for keeping your battery healthy.

Keep Your MacBook Plugged In More Frequently

Obviously it’s great to be able to sit with the MacBook on your lap out on the patio and surf the web or write your novel while you enjoy the sunset; the whole point of a laptop is that it’s a portable machine.

However, there are undoubtedly many times when you have it sitting on a desk like any other computer. When you have access to an AC outlet available at home or elsewhere, use it.

When using your Macbook not plugged into power, try not to let your battery get much below 50% before plugging it in again.

That reduces the number of times your MacBook will have to charge and extends its life. By not letting your Macbook get low on power before plugging in again, you’re essentially reducing strain on your battery.

Avoid Exposing Your MacBook to Extreme Temperatures

MacBooks work in a wide range of outside temperatures, but 62° F to 72° F (16.5° C to 22° C) is the ideal temperature range. Your machine will work just fine in cold temperatures; though your battery won’t last as long, it won’t be damaged by cold.

However, CHARGING your battery in sub-freezing temperatures is very dangerous – never charge a lithium battery in the cold.

Heat is another story; temperatures higher than 95° F/35° C can permanently damage the battery and reduce its capacity. Charging in high temperatures will cause additional damage.

Your MacBook’s software should prevent charging in these extreme environmental conditions, but it’s still a good idea for Mac owners to be aware of the temperature parameters.

Store Your MacBook at 50% Charge

In storage, your MacBook battery will discharge, but very slowly. If you’re planning to keep your MacBook stored over a long period of time (more than a month), charge it to about 50% of capacity before doing so.

Leaving it stored at full charge can cause it to lose capacity while leaving it stored with no charge can cause it to lose the ability to charge at all.

If you are storing the device for more than six months, then you should power it back up and recharge it to 50% again every six months. You should store your MacBook in a dry environment where it will not exceed 90° F/35° C.

Replacement Batteries

Apple has incredibly strict policies on third-party modifications. If your Macbook is still under warranty and the battery is done, contact Apple Support for replacement options. You can always start by running Apple Diagnostics from home. Assuming you’re overusing a battery that is ‘Normal’ you can always optimize your battery life.

The company does not authorize many shops to work on their products, taking your Macbook to a third-party repair shop means you’re getting a battery that isn’t original to your device.

Having someone work on your Macbook without Apple parts or the right certifications means that Apple will no longer uphold your warranty, nor will they ever work on your device again.

If you’re having battery issues that aren’t resolved by the SMC reset, contact Apple before doing anything else. The cost of a repair through the manufacturer may be equivalent to the cost of a third-party shop, or even free.

 

16 thoughts on “Service Battery Warning on Mac – Do You Need to Replace the Battery?”

Avatar Norma says:
Hi! I found everything very helpful, thanks! But my problem is that I just changed the battery, so this one is new (from a trustable seller) and the cycle count is 2! is this possible??? I noticed it was lasting no longer than 4 hours just the first day after changing it and then I did all the diagnosis. Haven’t done the SMC procedure yet.
Main problem is the quarantine… I hope you can give me some feedback. Thanks in advance!
Avatar Nour Naim says:
I have the same problem. I changed it recently and i only used 4 cycles! Did u did u find a solution?
Avatar Abram says:
Resetting the SMC worked—thank you!
Avatar Justin says:
Reset SMC a few times, and the ‘service battery’ notification is still around. Tried to calibrate the battery but I could not do so because the MacBook would just shut off when the battery reached about 60% of its capacity. The battery cycle of the MacBook is only at 27.
Do you think that resetting my MacBook will help with this service battery situation?

Thanks.
Justin

Avatar J says:
Had the “Service your battery!” warning even though my cycles were under 700 on a newish Macbook. Resetting the System Management Controller did it for me. Thanks!

Also great to read more background into why things are the way they are rather than just getting a “try this” step-by-step like other sites might provide.

Avatar Chloe says:
Had the service battery warning come up and found this article while trying to work out what that meant. The cycles were only at 681 and its only a few years old and other wise runs perfectly. Tried the reset SMC and it worked perfectly, battery is back to normal and has saved me an expensive apple trip!
Avatar Mary says:
The problem with my MacBook Air is that I cannot get the battery to discharge. I used to discharge it on a regular basis but when PGE started the power outages, I stopped discharging it regularly. Now it will discharge to about 88% then shut itself off. The Cycle Count is 299 but Condition: Service Battery Any advice would be most welcome.
Avatar Niki says:
I’m experiencing this same issue! SOS!
Avatar glenn says:
Me too
Avatar kaci butler says:
Amazon Number: Seamlessly Update Delivery Information
Sometimes users are unable to update their delivery information but due to some technical glitches, they have to face some sorts of trouble in doing the same. To get the optimum solution, you should use Amazon Number which would help to fetch the right troubleshooting aid from the experts.
Avatar Gary says:
So easy to replace your own battery. Just did my wife MacBook Air…..$35 for the battery (Amazon or E-bay)…make sure you get the exact model number of your Mac before purchasing. The only issue are the extremely SMALL screws in the back of your laptop, and at least in the MacAir the screws that hold the battery in place. Make sure to make a note of where the LONG screws go back….AND place the loosened screws in a small paper cup or on a piece of paper as they are as small as a pinhead and easy to misplace. Go you YouTube for instructions. Very easy.
Avatar Diane Warburton says:
If the battery gets permanently damaged above 95°F (35°C) as the article says, then all Mac laptops destroy their own batteries… Intensive tasks, even something common as watching a Youtube video will see the processor temps in the Mac soar to double those figures or higher. Battery temps are lower but higher than 95°F (35°C)
Avatar Pedro says:
My MBP 13” (Early 2015) it’s 4 years old but I only have 180 cycles as It’s plugged-in all day to AC. I have the ‘service battery’ warning and I did both: SMC reset and battery recalibration but I still have the warning.

Here in Granada, Spain it’s common to reach temperatures of 104F in summer.. so that might have something to do with the warning…

Goods new are that the battery replacement out-of-warranty it’s “only” $129. Should I have it replaced?

Avatar Da’vonte Jordan says:
Thanks so much G, u a real one
Avatar Elle says:
Recalibrating my battery solved the issue. You saved me from the hassle of replacing. Thank you!
Avatar Talha Gull says:
How??? Please share the process.
Avatar fiteri says:
mine “service battery” appear but at the same time cannot charge the macbook…what should i do?
Avatar H says:
If it is close to the 1000 cycles, what’s the risk of waiting until it’s done for good before replacing it? I have everything backed up, might as well get all the life I can out of the battery, right?
Avatar Kath says:
How hard is it to do yourself?
I just got a price of $400 for a battery replacement on my 13″ macbook pro later 2015.
What is the best link for youtube directions?
Avatar Jim K says:
just changed the battery on my Mid 2014 MacBook pro, trying to rest the service battery and recognize the new battery. so far it is not. I have reset the NVRAM twice and reset the SMC twice, no luck. I am now charging it fully and then trying the suggestion above. i will drain it fully leave it overnight and then charge it fully
Avatar Jim K says:
charging fully then draining completely then charging fully for a second time worked. laptop works like new!
Avatar Bryant says:
Hi I’m looking to buy a used MacBook Pro from a friend and they say the only thing wrong is the service Battery Warning. How it expensive to replace the battery? Just want to know if I was getting a good deal.
Avatar JW says:
Depends on the model, as long as t can be opened and swapped it can be changed for $50-$100 or less if you buy a battery from online and can do it yourself which is fairly simple with youtube.
Avatar Jim K says:
Just did mine for $99.00 took about 30 min

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