When Should You Charge Your Macbook? (Based On Several Tests)


There’s nothing worse than using your Macbook to have the battery die at a faster rate than it did a few weeks ago. Unfortunately, this does happen a lot, so when should you charge your Macbook to maintain a healthy battery lifespan.

To preserve your Macbooks battery lifespan, you will want to charge your device to maintain a 75% to 25% charge cycle. This is because Macbooks use Lithium-ion batteries, which operate in charge cycles; a 75% to 25% charge cycle has been shown to be the most optimal charge cycle for maintaining essential temperature levels and reducing stress from high discharges & overcharges, thus offering a long battery lifespan.

Let’s take a look at this in more detail by looking at what several studies reveal about how simple changes can have a dramatic impact on your battery health. Let’s dive in!

When Should You Charge Your Macbook Pro For a longer Battery Life expectancy?

There are two main reasons why you should worry about your Macbook’s battery health; these are Battery capacity & Performance. Simply understanding how your device’s battery works can help prolong your Macbooks battery expectancy and slow down the rate at which your battery capacity and performance diminishes.

Both MacBook Pro’s and Macbook Air use Lithium-Ion batteries. Lithium-Ion batteries become less effective every time they chemically age; According to apple, this results in longer app launch times, lower frame rates, reduced wireless data throughput, screen dimming, lower speaker volume.

So what causes your Macbook to chemically age?

There are three main factors; these are Charge cycles, The temperatures you expose your device to, & the battery percentage that you store your device at.

Starting with charge cycles.

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Lithium-Ion batteries work in charge cycles; a charge cycle is when your device consumes equal to 100% of its battery capacity. The more charge cycles consumed, the faster your device’s battery health diminishes.

The main thing you will need to know about Lithium-Ion batteries is that once your battery drops below 20%, it will consume one charge cycle, and every time you charge your device over 80%, it adds additional stress to your device, which in turn will chemically age your battery at a faster rate.

This is why Apple uses Optimized charging on all Macbooks, which reduces the rate your Macbook is charged once it reaches 80% battery in order to preserve battery health.

So now that we understand how Lithium-Ion batteries work, what is the best charge cycle to help maintain battery health?

According to a study done by Battery University, the best charge cycle for a prolonged battery life is 75% to 25%; this charge cycle had the second-best results in the long run when it comes to maintaining battery capacity and battery performance.

The best being a 75–65% charge cycle. However, since this is only a 10% battery capacity, it’s not a practical charge cycle.

Additionally, the study shows a charge cycle from 100–25% Has a significantly shorter lifespan.

Enviromental Tempratures & Storage

Now there are two other factors that have an impact on your Macboooks battery health; these are the environmental temperatures you operate and store your device at, as well as the battery percentage you store your device at.

Lithium-Ion batteries can be overcharged when temperatures are elevated, and this is typically caused by the environmental temperatures in which you store or operate your device.

Apple recommends using your Macbook in temperatures between 50° and 95° F (10° and 35° C). Anything above or below this temperature can cause permanent damage to your device’s battery, thus severely reducing its battery capacity.

The second is the battery percentage at which you store your device; as we mentioned above, Lithium-batteries don’t operate well in extreme temperatures. Storing your device at a high battery percentage may elevate your device’s temperature, which can cause your battery to become unstable.

Storing your device at 100% battery is not a good idea; instead, you would want to discharge your battery to around 40% if you decide to store your device for a few days.

 Battery university shows the impact of battery degradation in extreme temperatures when your device is stored at 100% battery. After three months of storing your device at 100% battery at 40°C, your apple watch will only retain 65% of its battery capacity. If the Apple watch is stored at 40% battery at 40°C, it will retain 75% of its battery capacity.

How long does Macbook Air & Macbook Pro battery last?

The first thing to note is the battery life is also dependent on how you use your Macbook. This includes screen brightness, optimized settings if you have multiple tabs open, multiple applications are running, and if you are playing games—all these factors into the overall battery life.

But on average, on moderate usage, your MacBook air M1 should last around 9.5 hours.

As for the Macbook Pro, the 16-inch MacBook Pro should last 8 hours, and the 14-inch around 6.5 hours.

With extreme usage, here’s how long to expect your Macbook Pro to last:

MacBook Pro 13 inch: M1 5 hours 20 minutes

MacBook Pro 14-inch: 3 hours 40 minutes

MacBook Pro 16-inch: 5 hours 30 minutes

MacBook Pro Max 16-inch: 2 hours 58 minutes

Tips To Making Your Macbook’s Battery Last Longer:

Reduce Screen Brightness

Reducing screen brightness in itself will dramatically improve your battery life; you can adjust your screen brightness by pressing the F1 key to lower the brightness or the F2 key to increase the brightness.

Alternatively, you can do this manually by going to System Preferences select Displays, and you’ll be able to use the slider to adjust your screen brightness.

Turn Bluetooth Off

This isn’t a massive battery boost. You’ll only receive a few minutes from turning off Bluetooth. However, if you won’t be using it, then you might as well save the extra couple of minutes.

Check For Apps That Drain The Most Battery

You’re able to check exactly what apps use the most battery and drain your laptop at a faster rate. To do this, go to you’ll want to locate your Utility folder is found in System Preferences and select the Activity Monitor app.

Update Software & Apps

Apps and software updates are done to improve the efficiency of the product. This can also include energy consumption. So you’ll want to check for any software or app updates.

Play Games Or Watch Movies On Full Screen

Believe it or not, using your device on full screen when watching movies or playing video games does reduce the amount of power used compared to a minimized screen. So try it out the next time you’re in dire need of battery life.

Close All Unused Apps or Applications

Last but not least, one of the main culprits of battery consumption is having unused applications running in the background or having multiple unused tabs open, simply turning them off can make a substantial difference in battery life.

Can I charge my MacBook overnight?

Charging your Macbook overnight will have no impact on battery health; this is because Lithium-Ion batteries are designed to stop charging once your device reaches 100% battery.

Steven Carr

Steven is a certified IT professional and gaming enthusiast. He has been working in the tech industry for over 10 years, and specializes in all things Tech-related. When he's not geeking out over the latest hardware or software release, he can be found testing out the latest video game.

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