Replacing your MacBook battery: easier than you think
Your MacBook battery is deteriorating. You're increasingly searching for a power outlet. That "10% battery" message pops up again halfway through your workday. You consider a new MacBook, but it costs a fortune. Or you buy separate accessories like a power bank – not ideal either.
Still, you don't have to shell out thousands of euros for a new device right away. Here's what most people don't know: replacing a MacBook battery is surprisingly simple . No technical expertise required, no expensive repair shop. With the right battery and an hour of your time, you'll get years of enjoyment out of your current MacBook. Even if you normally struggle to connect your AirPods .
The trick is preparation and the right tools. This will not only save you hundreds of euros, but also the frustration of constant charging.
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Why replace your MacBook battery now
A weak battery affects more than just your work time. Your entire system's performance suffers. macOS deliberately slows down the processor when the battery is weak. You'll notice this in sluggish apps, choppy videos, and slow file transfers. A new battery will solve this immediately.
Most users think battery replacement is complicated. That's not true. With the right preparation and tools, you can replace the battery in under an hour, even without any technical experience.
Preparation: this is what you need
Tools
- Pentalobe screwdriver (P5 for newer models, P6 for older ones)
- Torx screwdriver set (T3, T5, T8)
- Plastic spudger or pick
- Antistatic wrist strap (optional but recommended)
- Magnetic screw mat
Choosing the right battery
Not every battery fits every model. First, check your exact MacBook model via Apple menu > About This Mac. Note the model number (for example, A1466 for a 2017 MacBook Air 13").
Choose between original Apple batteries or high-quality alternatives. Original batteries cost more but offer Apple's warranty. Alternative batteries from brands like iFixit or NewerTech often perform just as well for half the price.
Step 1: Backup and disable
First, make a full backup via Time Machine. While the chances are slim, something can always go wrong. Then, close all programs and shut down your MacBook completely. Hold the power button until the screen goes black.
Remove all cables and external devices. Place the device on a clean, flat surface with a soft cloth underneath.
Step 2: Open the case
Turn your MacBook over. You'll now see the pentalobe screws around the edge. There are 10 of them on a MacBook Air, and usually 8 to 10 on a Pro.
Loosen the screws, but don't remove them completely. They'll remain in the housing. Use the magnetic mat to remember the order, as each screw has a specific length.
Carefully lift the bottom edge. Start at the hinge side and work your way forward. Use a plastic spudger if it's stuck. Never pull with force.
Step 3: Disconnect the old battery
Once the case is open, you'll immediately see the battery. It's the largest component, usually black with warning labels.
First, locate the battery connector. This is a small cable with a plastic plug that runs to the motherboard. Use the spudger to gently pry it loose. Never pull on the cable itself.
Newer models (2016 and later) have additional screws holding the battery in place. Remove these with the appropriate Torx screwdriver.
Step 4: Remove the battery
For models up to 2015
These batteries are secured with special adhesive strips. Pull these strips out slowly and evenly. Maintain an angle of about 30 degrees. If a strip breaks, use a plastic card to gently pry the battery free.
For models from 2016
These batteries use screws instead of glue. Remove all the screws (usually 4 to 6) and carefully lift the battery out.
Caution: The old battery may be bulging. Handle it with extra care and dispose of it according to local regulations.
Step 5: Installing the new battery
Insert the new battery exactly where the old one was. For models with adhesive strips, first remove the protective film from the new strips.
Press the battery firmly but gently. Make sure it's completely flat, with no bumps or air pockets.
Reconnect the battery connector. You'll hear a soft click when it's securely connected. Check that the cable isn't twisted or kinked.
Testing and calibration
Replace the bottom cover and tighten the screws by hand. Start up your MacBook while it's still unplugged.
Check the battery status immediately via the Apple menu. The new battery should be approximately 50-60% charged. If not, connect the charger immediately.
Calibration procedure
- Charge the battery fully to 100%
- Leave the charger connected for another 2 hours
- Use the MacBook normally until it turns off due to an empty battery
- Leave the appliance switched off for at least 5 hours
- Recharge fully without interruption
This procedure optimizes battery measurement and extends its lifespan.
Common problems
MacBook won't start up
Check that the battery connector is securely connected. Try resetting the SMC by holding down shift-control-option-power for 10 seconds.
Battery is not recognized
This usually indicates an incompatible battery. Double-check the model number. Sometimes a PRAM reset (option-command-PR during startup) helps.
Shorter battery life than expected
New batteries require several charge cycles to reach optimal performance. Give the device a week of normal use before drawing any conclusions.
When to call in a professional
Some situations require professional assistance. For example, water damage, a swollen, stuck battery, or if your MacBook is still under warranty.
A refurbished device might be a smarter alternative. These devices receive a professional new battery and a full inspection. This is often cheaper than a repair at Apple itself.
Maintenance for a longer lifespan
A new battery will last 3 to 5 years with proper care. Avoid extreme temperatures, both hot and cold. Don't leave the battery fully charged or discharged for months at a time.
Use the original charger or a certified alternative. Cheap chargers damage the battery and make it unsafe.
Enable optimized charging in System Preferences > Battery. macOS learns your usage patterns and charges more intelligently, preventing unnecessary wear and tear.
With this knowledge, you can replace your MacBook battery yourself. It'll save you hundreds of euros and give your device years of life. Plus, it's a valuable skill you can share with friends and family.
Conclusion: Doing it yourself is worth it
Replacing a MacBook battery turns out to be surprisingly affordable. With the right tools and an hour's time, you can give your device years of life. The investment of a few dozen euros for tools and a new battery easily outweighs the cost of a completely new device.
If it doesn't work out, or you don't want the hassle, refurbished MacBooks with professionally replaced batteries are a great alternative. But with this guide, most people can easily do it themselves.
