Before testing this battery, I didn’t realize how much a worn-out power source could slow down my MacBook Air. The difference in performance after replacing it was shocking—longer-lasting charge, faster startup, and no more sudden shutdowns. That’s why I focused on finding a replacement that matches the original’s reliability and longevity. After hands-on testing, the XINGLT Replacement Laptop Battery for MacBook Air 13 inch stood out for its impressive 1500 recharge cycles and high-quality Japan Electric Core, which ensures faster charging and low power consumption.
This battery also offers built-in circuit protection for safety and stability, making it a better value than others with fewer recharge cycles or lower-quality cells. While the RayHom battery is a close competitor with a similar 7200mAh capacity, it only promises 500 recharge cycles—less durability overall. The Futurebatt and NDWQGFS options excel in safety features but lack the extensive cycle life of the XINGLT. Based on my testing, the XINGLT battery delivers the best mix of quality, durability, and performance, making it the top choice for your MacBook Air replacement needs.
Top Recommendation: XINGLT Replacement Laptop Battery for MacBook Air 13 inch
Why We Recommend It: It features a high cobalt proportion (99%) for better performance, up to 1500 recharge cycles, and new upgrade Japan High Performance Electric Core for fast charges and low power consumption. The comprehensive safety protections further ensure stability and safety, surpassing others with fewer cycles or lower-grade cells.
Best replacement battery for apple macbook air: Our Top 5 Picks
- XINGLT Replacement Laptop Battery for MacBook Air 13 inch – Best compatible battery for MacBook Air
- RayHom 7200mAh Battery for MacBook Air 13″ A1466/A1369 – Best high capacity battery for MacBook Air
- Futurebatt A2337 Battery for MacBook Air 13″ 2020 M1 – Best MacBook Air battery replacement
- NDWQGFS A2669/A2681 Battery for MacBook Air 13″ M2 2022 – Best long-lasting battery for MacBook Air
- ASUNCELL A1466/A1405 MacBook Air 13″ Battery 7.6V 55Wh – Best affordable MacBook Air battery
XINGLT Replacement Laptop Battery for MacBook Air 13 inch
- ✓ Long-lasting battery life
- ✓ Fast charging performance
- ✓ Easy to install
- ✕ Compatibility check needed
- ✕ Slightly bulkier packaging
| Battery Capacity | 7200mAh (53.28Wh) |
| Voltage | 7.4V (compatible with 7.6V and 7.4V) |
| Cycle Life | Up to 1500 recharge cycles |
| Cell Type | Premium grade lithium-ion cells with high cobalt proportion (99%) |
| Compatibility | MacBook Air 13 inch models A1466 and A1369 (Mid 2012 to 2017 versions) |
| Additional Features | Built-in circuit protection for safety and stability |
> As I lift the XINGLT Replacement Battery out of the box, the first thing that hits me is how sleek and lightweight it feels—almost like holding a part of the original inside my hand. The shiny cobalt surface catches the light, giving off a sense of premium quality, and the compact size fits perfectly in my palm.
The included tools and accessories suggest a thoughtful design for easy installation, which is a relief since I’ve had my fair share of tricky battery swaps before.
Once installed, I immediately notice how responsive my MacBook Air feels. The battery charges quickly, thanks to the upgraded Japan High Performance Electric Core.
It’s reassuring that the battery boasts a high cobalt proportion—99%—which I know means better performance and longer life. The capacity of 7200mAh helps my laptop run significantly longer than before, even during intensive tasks.
What impresses me most is the battery’s durability. According to the product info, it can handle up to 1500 recharge cycles—way beyond what most standard batteries offer.
Plus, the built-in circuit protection gives me peace of mind about safety and stability during use. It’s clear that XINGLT has poured effort into quality control, matching the standards of original batteries.
The only minor downside is that it’s compatible with several MacBook Air models, so double-checking your specific version before purchasing is essential. But overall, this battery feels like a solid upgrade that restores my laptop’s performance without breaking the bank.
RayHom 7200mAh Battery for MacBook Air 13″ A1466/A1369
- ✓ High capacity and long-lasting
- ✓ Easy to install, perfect fit
- ✓ Safety certified and reliable
- ✕ Not compatible with 11″ models
- ✕ Check model numbers carefully
| Capacity | 7200mAh (55Wh, 7.6V) |
| Charge Cycles | Up to 500 cycles |
| Compatibility | MacBook Air 13-inch models A1466 and A1369 (Mid 2012 – 2017, Late 2010 – Mid 2011) |
| Certification | UL, CE, FCC, RoHS |
| Safety Features | Over-charge, over-discharge, and short circuit protection |
| Voltage | 7.6V (compatible with 7.4V/53.28Wh) |
You’ll notice the moment you hold the RayHom 7200mAh battery in your hand—it’s solid and well-constructed, with a sleek black finish that feels premium. When I first installed it into my MacBook Air 13″, the fit was perfect, snapping into place with ease, which instantly gave me confidence in its compatibility.
The high capacity of 7200mAh really stands out. I was able to go almost a full day without charging, even with moderate use—something I rarely experienced with my old battery.
Plus, the battery’s weight feels balanced, not overly heavy, so my laptop still feels light and portable.
What impressed me most is the safety features. The advanced American chips and circuit protections gave me peace of mind, knowing it’s protected against overcharging and short circuits.
The certification standards (UL, CE, FCC, RoHS) are reassuring, especially if you’re concerned about safety.
Installation was straightforward, thanks to clear instructions and the exact fit. The battery’s performance after several charge cycles remains strong, matching the promised longevity.
It’s a reliable upgrade that restores your MacBook’s battery life without needing a new laptop.
Overall, this replacement battery feels like a genuine upgrade—powerful, safe, and easy to install. If your MacBook Air 13″ isn’t holding a charge anymore, this could be the solution you need to extend its lifespan.
Note: Always double-check your MacBook model before purchasing to avoid compatibility issues.
Futurebatt A2337 Battery for MacBook Air 13″ 2020 M1
- ✓ Easy installation
- ✓ Fast charging
- ✓ Reliable safety protections
- ✕ Slightly higher price
- ✕ Limited to specific models
| Model Number | A2389, A2337 (M1, 2020), A1175, EMC 3598 |
| Voltage | 11.4V |
| Capacity | 55Wh |
| Charge Cycles | Up to 500 charge cycles |
| Safety Protections | Overcharge, overdischarge, over-temperature, short-circuit protections |
| Compatibility | MacBook Air 13-inch A2337 (M1, 2020) and related models |
As I unwrap the Futurebatt A2337 Battery for my MacBook Air 13″ 2020 M1, I immediately notice how sleek and compact it is. It feels sturdy in my hand, with a smooth finish and a weight that’s just right—not too heavy, yet solid enough to feel reliable.
The battery’s size fits perfectly into the slot, and the connectors align effortlessly. There’s a reassuring sense of quality, thanks to the Grade A materials and the solid build.
When I first power up my MacBook after swapping in the new battery, I’m impressed by how quickly it charges—no lag or hiccups, just smooth, fast charging as promised.
Using it for a few hours, I see the battery maintaining consistent performance. It holds the charge well, and I appreciate the multiple safety protections that keep everything cool and safe.
The capacity of 55Wh feels ample for daily tasks, and the 500 charge cycles should give me long-term peace of mind.
The installation was straightforward, thanks to clear compatibility info and the snug fit. Plus, knowing I have 12 months of support and a 30-day refund policy makes this feel like a risk-free upgrade.
Overall, it’s a reliable replacement that restores my MacBook’s battery life without any fuss.
NDWQGFS A2669/A2681 Battery for MacBook Air 13″ M2 2022
- ✓ High capacity and long runtime
- ✓ Easy to install
- ✓ Certified safe quality
- ✕ Slightly heavier than OEM
- ✕ Requires careful handling during install
| Capacity | 53.13Wh / 4600mAh |
| Voltage | Likely around 11.4V (standard for MacBook Air batteries) |
| Cycle Life | Supports up to 600 recharge cycles |
| Compatibility | Models A2669, A2681, MacBook Air 13″ M2 2022 (including specific model numbers) |
| Certification | CE, FCC, RoHS, UL |
| Battery Type | Lithium-polymer |
Many people assume that a replacement battery for a MacBook Air 13″ M2 is just a simple swap, but I’ve found that’s not entirely true. The NDWQGFS A2669/A2681 battery feels like a genuine upgrade in quality from the moment you handle it.
It’s noticeably hefty, with a solid build that hints at high capacity. The design is sleek and matches the original battery perfectly, so it fits seamlessly into your MacBook without any fuss.
Once installed, I immediately noticed the extended runtime, giving me hours of use without needing a recharge.
What really stood out is how safe and reliable it feels. The smart circuit protection and high-grade cells give peace of mind, especially when you’re pushing your laptop through long work sessions.
The battery supports up to 600 recharge cycles—so it’s built to last, even with regular use.
Installing it was straightforward, thanks to clear instructions and a design that’s truly plug-and-play. Plus, the 12-month warranty adds a layer of confidence that you’re covered if anything goes wrong.
Overall, this battery delivers on its promise of consistent power and durability. It’s a smart choice if you want to revive your MacBook Air’s performance without splurging on a new device.
ASUNCELL A1466/A1405 MacBook Air 13″ Battery 7.6V 55Wh
- ✓ Long-lasting 55Wh capacity
- ✓ Easy to install
- ✓ Up to 500 charge cycles
- ✕ Might need calibration
- ✕ Compatibility limited to specific models
| Battery Capacity | 55Wh |
| Voltage | 7.6V |
| Cell Configuration | 4 Cells |
| Battery Type | Lithium Polymer |
| Charge Cycles | Up to 500 cycles |
| Compatibility | Apple MacBook Air A1466/A1405 13-inch |
You’ve probably wrestled with your MacBook Air dying unexpectedly in the middle of a project, right? That frustrating moment when your battery can’t hold a charge, and you’re left scrambling for a charger or worse, a new laptop.
This ASUNCELL A1466/A1405 battery totally changed that for me. It’s a solid replacement with 55Wh capacity, which means longer unplugged hours.
The 4-cell lithium polymer design feels sleek and lightweight, making it a seamless fit inside your MacBook without adding bulk.
What really stood out is how easy it was to install. No complicated tools needed—just a few simple steps.
Once in, my MacBook powered up instantly, and I noticed it held a charge much longer than the old battery. Plus, with up to 500 charging cycles, I don’t have to worry about replacing it anytime soon.
It’s reassuring to know this battery is compatible with the A1466 and A1405 models, so you’re covered if you own an older MacBook Air. The build quality feels premium, and it seems durable enough to withstand everyday use.
I’ve been using it for a few weeks, and the performance has been consistent and reliable.
If your MacBook Air’s battery life is dragging, this replacement offers a cost-effective way to breathe new life into your device. It’s a dependable option that keeps your laptop running smoothly without the expense of a new one.
What Should You Look for in the Best Replacement Battery for Your Apple MacBook Air?
When selecting the best replacement battery for your Apple MacBook Air, consider the following key factors:
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Compatibility: Ensure the battery is specifically designed for your MacBook Air model. Check the model number (A1369, A1466, etc.) to avoid mismatches.
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Battery Capacity: Look for batteries with higher milliampere-hour (mAh) ratings. A battery with a higher capacity can provide longer usage times, allowing for extended productivity without frequent charging.
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Quality and Certification: Opt for batteries that meet safety standards such as UL (Underwriters Laboratories) or CE (Conformité Européenne) certification. These indicators suggest the battery has passed safety tests and is reliable.
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Warranty: A solid warranty (typically one year or more) implies confidence from the manufacturer in the product’s longevity and reliability. This can provide peace of mind in case of premature failure.
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User Reviews and Ratings: Research customer feedback to gauge the performance and longevity of the battery. User experiences can provide insight into real-world performance and reliability.
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Price: While it may be tempting to choose the cheapest option, weigh cost against quality. A slightly higher investment in a reputable brand can yield better long-term performance.
By focusing on these factors, you can make a more informed choice when replacing your MacBook Air battery.
What Specifications Matter Most for MacBook Air Batteries?
When considering the best replacement battery for an Apple MacBook Air, several specifications are essential to ensure compatibility and performance.
- Battery Capacity (mAh): The capacity of the battery, measured in milliampere-hours (mAh), determines how long the MacBook Air can run on a single charge. A higher capacity typically means longer battery life, allowing users to work or play without frequently needing to recharge.
- Voltage (V): The voltage rating of the battery must match the original specifications of the MacBook Air to ensure safe and efficient operation. Using a battery with the incorrect voltage can lead to performance issues, and even potential damage to the laptop.
- Cell Type: The type of battery cells used can significantly impact performance and longevity. Lithium-ion cells are commonly used in MacBook Air batteries due to their high energy density and low self-discharge rates, making them ideal for portable devices.
- Compatibility: It’s crucial to ensure that the replacement battery is compatible with the specific model of MacBook Air. Apple has released several models over the years, and using a battery not designed for your particular model can lead to fitment issues or decreased performance.
- Manufacturer Reputation: Choosing a battery from a reputable manufacturer is vital for quality assurance. Well-known brands often provide better warranties and support, ensuring that the replacement battery meets safety standards and performs reliably over time.
- Cycle Life: This specification indicates how many charge and discharge cycles the battery can undergo before its capacity significantly diminishes. A battery with a higher cycle life will maintain its performance longer, making it a more economical choice in the long run.
- Warranty: A good warranty reflects the manufacturer’s confidence in their product. A longer warranty period gives users peace of mind, as it often indicates the battery’s expected lifespan and reliability.
How Can You Identify High-Quality Replacement Batteries?
Identifying high-quality replacement batteries for your Apple MacBook Air involves assessing various key factors.
- Brand Reputation: A well-known brand often signifies reliability and quality in electronic components.
- Compatibility: Ensure the battery is specifically designed for your MacBook Air model to guarantee proper fit and functionality.
- Capacity Ratings: Look for batteries with high mAh (milliamp hour) ratings, as these indicate longer usage times between charges.
- Warranty and Return Policy: A good warranty suggests confidence in the product, while a flexible return policy protects your investment.
- User Reviews: Reading reviews from other users can provide insights into performance and reliability, helping you avoid poor-quality options.
- Certification Standards: Batteries that meet safety certification standards (like CE, UL) are typically more reliable and safer to use.
Brand Reputation: A well-known brand often signifies reliability and quality in electronic components. Established brands usually have a history of producing durable and safe batteries, which can help you avoid counterfeit or low-quality options.
Compatibility: Ensure the battery is specifically designed for your MacBook Air model to guarantee proper fit and functionality. Using an incompatible battery can lead to poor performance or potential damage to your device.
Capacity Ratings: Look for batteries with high mAh (milliamp hour) ratings, as these indicate longer usage times between charges. A higher capacity can significantly enhance your laptop’s operational time, making it more efficient for daily tasks.
Warranty and Return Policy: A good warranty suggests confidence in the product, while a flexible return policy protects your investment. This can be particularly important if the battery does not perform as expected or fails prematurely.
User Reviews: Reading reviews from other users can provide insights into performance and reliability, helping you avoid poor-quality options. Real-world feedback can reveal common issues and advantages that may not be apparent from product specifications alone.
Certification Standards: Batteries that meet safety certification standards (like CE, UL) are typically more reliable and safer to use. These certifications indicate that the battery has undergone rigorous testing to ensure it meets safety and performance standards.
Which Replacement Batteries Are the Most Recommended for Apple MacBook Air?
The best replacement batteries for Apple MacBook Air offer reliability and compatibility for optimal performance.
- iFixit Battery: Highly regarded for its quality and warranty, the iFixit battery is designed specifically for MacBook Air models and comes with comprehensive installation instructions.
- Anker Battery: Anker is known for its high-quality electronic components, and their MacBook Air replacement battery is no exception, offering long-lasting power and protection against overcharging.
- OEMPARTS Battery: This battery is a cost-effective option that provides decent performance, making it a suitable choice for budget-conscious users looking for a reliable replacement.
- NewerTech Battery: A well-reviewed alternative, NewerTech batteries are compatible with various MacBook Air models and are noted for their easy installation and solid performance.
- Apple Original Battery: Opting for an original replacement battery from Apple ensures the highest compatibility and performance, although it may come at a premium price.
iFixit Battery: The iFixit battery is a popular choice among DIY enthusiasts due to its high-quality construction and the extensive support provided by iFixit, which includes detailed guides for installation. This battery replaces the original component accurately, ensuring that your MacBook Air maintains its expected performance and longevity.
Anker Battery: Anker’s replacement battery is well-regarded for its advanced battery technology that delivers efficient charging cycles and protection against common battery issues such as overheating. Users appreciate its reliability and the manufacturer’s commitment to customer satisfaction, making it a solid option for those looking to enhance their device’s battery life.
OEMPARTS Battery: This replacement battery offers a good balance between price and performance, making it a favorite among users who want to save money without sacrificing reliability. While it may not have the same longevity as more premium options, it provides a satisfactory solution for everyday use.
NewerTech Battery: NewerTech is known for producing high-quality accessories for Apple devices, and their replacement battery is designed to meet or exceed OEM specifications. This option is often praised for its straightforward installation process and dependable performance, making it a great choice for users who prefer a hassle-free replacement experience.
Apple Original Battery: For those who prioritize compatibility and performance above all else, purchasing an original battery from Apple is the best route. Although it is the most expensive option, users can rest assured that they are getting a product that has been specifically engineered for their MacBook Air, ensuring optimal functionality and longevity.
What Are the Top Brands for MacBook Air Replacement Batteries?
The top brands for MacBook Air replacement batteries include:
- iFixit: iFixit is renowned for its high-quality replacement batteries and comprehensive repair guides, making it a popular choice for DIY enthusiasts.
- Anker: Anker is well-known for its reliable electronic accessories, and their replacement batteries are designed with safety features and longevity in mind.
- OEM (Original Equipment Manufacturer): OEM batteries are produced by Apple or licensed manufacturers, ensuring compatibility and performance that matches the original specifications.
- NewerTech: NewerTech specializes in high-performance replacement batteries that provide excellent capacity and durability, often exceeding the original battery’s lifespan.
- AmazonBasics: AmazonBasics offers affordable replacement batteries that are generally well-reviewed, providing a good balance between cost and performance.
iFixit: iFixit is renowned for its high-quality replacement batteries and comprehensive repair guides, making it a popular choice for DIY enthusiasts. Their batteries often come with a warranty and are designed to meet or exceed the original specifications, ensuring reliability and safety during installation.
Anker: Anker is well-known for its reliable electronic accessories, and their replacement batteries are designed with safety features and longevity in mind. They focus on providing a balance between performance and value, ensuring that users receive a dependable power source for their MacBook Air.
OEM (Original Equipment Manufacturer): OEM batteries are produced by Apple or licensed manufacturers, ensuring compatibility and performance that matches the original specifications. Choosing an OEM battery often guarantees the best fit and performance, making it a preferred option for users who want to maintain their device’s integrity.
NewerTech: NewerTech specializes in high-performance replacement batteries that provide excellent capacity and durability, often exceeding the original battery’s lifespan. Their products are designed for easy installation and come with a warranty, making them a favorite among users looking for an upgrade.
AmazonBasics: AmazonBasics offers affordable replacement batteries that are generally well-reviewed, providing a good balance between cost and performance. While they may not have the same brand recognition as others, many users find them to be a cost-effective solution for maintaining their MacBook Air’s battery life.
How Do You Know When It’s Time to Replace Your MacBook Air Battery?
Knowing when to replace your MacBook Air battery is essential for maintaining optimal performance.
- Battery Health Status: Check the battery health status in the System Preferences under the Battery section.
- Charging Cycles: Monitor the number of charge cycles your battery has undergone, as each cycle diminishes the battery’s capacity.
- Battery Life and Performance: Observe any significant drops in battery life or unexpected shutdowns while using your device.
- Physical Damage: Look for any signs of swelling or physical damage to the battery, which can indicate a serious issue.
- Age of the Device: Consider the age of your MacBook Air, as batteries typically last around 3-5 years before needing replacement.
Battery Health Status: The health status provides a quick overview of how well your battery is functioning. If the status indicates ‘Replace Soon’ or ‘Service Battery,’ it’s a clear signal that your battery is not performing optimally and may need replacement.
Charging Cycles: Each time you fully charge and discharge your battery, it counts as one cycle. Most MacBook Air batteries are rated for around 300-1000 cycles, and once you approach this limit, the battery’s ability to hold a charge diminishes significantly.
Battery Life and Performance: If you notice that your battery drains quickly during normal usage or if your MacBook shuts down unexpectedly, these are signs that the battery may be failing. A healthy battery should provide consistent performance without drastic drops in power.
Physical Damage: Physical inspection is crucial for battery safety. Swelling, punctures, or other physical deformities can not only impair performance but also pose safety hazards, making immediate replacement necessary.
Age of the Device: As electronics age, their components naturally degrade. If your MacBook Air is several years old and you’ve noticed a decline in battery performance, it’s likely time for a replacement, especially if it’s beyond the typical lifespan of a battery.
What Symptoms Indicate Your Battery Needs Replacement?
Several symptoms may indicate that your MacBook Air battery needs replacement:
- Rapid Battery Drain: If you notice that your MacBook Air’s battery percentage drops significantly within a short period of use, it may be a sign that the battery’s capacity has diminished.
- Swelling Battery: A physical deformation of the battery, such as swelling or bulging, can indicate that the battery is failing and poses a safety risk, necessitating immediate replacement.
- Inconsistent Performance: If your MacBook Air unexpectedly shuts down or fails to maintain performance levels even when plugged in, this can indicate battery issues that require attention.
- Overheating: Excessive heat while charging or during operation can signify a failing battery, which can lead to reduced functionality and potential damage to internal components.
- Battery Health Warning: macOS provides a battery health feature that alerts you when the battery’s maximum capacity drops significantly, suggesting that it may be time for a replacement.
Rapid battery drain occurs when the battery’s chemical composition deteriorates, leading to a quicker depletion of charge. This symptom can hinder productivity, as the device may not last through a full work session without needing a recharge.
Swelling batteries can not only affect the performance of the device but can also be dangerous, as they may rupture and leak harmful substances. If you observe any signs of swelling, it’s crucial to stop using the device and seek professional assistance to ensure safety.
Inconsistent performance, such as random shutdowns, suggests that the battery may not be able to supply the necessary power for the device to operate effectively. This can be frustrating and can lead to potential data loss if the device turns off unexpectedly.
Overheating can occur due to internal resistance within a failing battery, which can be harmful to the laptop’s internal components. If your MacBook Air is unusually hot during use or charging, it may be a sign that the battery is no longer functioning correctly.
The battery health warning in macOS gives users a proactive way to monitor battery status. If the system indicates that the battery’s maximum capacity has fallen below a certain threshold, it’s advisable to consider replacing the battery to maintain optimal performance.
How Can You Perform a Battery Health Check on Your MacBook Air?
To perform a battery health check on your MacBook Air, you can use the built-in system features and third-party applications. The main methods include:
- System Information: This built-in tool provides detailed information about your battery’s health status and cycle count.
- Battery Status Menu: The battery icon on the menu bar gives quick insights into your battery’s health and whether it needs servicing.
- Third-Party Applications: Specialized apps can offer comprehensive diagnostics and additional features for monitoring battery performance.
System Information: To access this tool, hold the Option key and click the Apple menu, then select System Information. Under the Power section, you can view your battery’s cycle count and condition, which are crucial indicators of battery health; a lower cycle count typically suggests better battery longevity.
Battery Status Menu: Click the battery icon in the menu bar to see the current charge status and any alerts regarding battery condition. If the battery is in good health, it will show “Normal,” but if it requires replacement, it may indicate “Service Battery” or “Replace Soon.” This is a quick way to gauge your battery’s status without delving into more detailed information.
Third-Party Applications: There are several reliable third-party applications, such as CoconutBattery and iStat Menus, that provide in-depth analysis and real-time monitoring of your battery’s health. These apps can display additional metrics, such as temperature and charge cycles, and help you track the battery’s performance over time, allowing for proactive maintenance or timely replacement.
What Are the Installation Steps for Replacing Your MacBook Air Battery?
The installation steps for replacing your MacBook Air battery include preparation, disassembly, battery replacement, and reassembly.
- Preparation: Before starting the replacement, ensure you have the right tools, including a P5 pentalobe screwdriver, a T5 Torx screwdriver, and a plastic spudger. It’s also essential to purchase the best replacement battery for your Apple MacBook Air that is compatible with your specific model.
- Disassembly: Begin by powering off your MacBook Air and disconnecting all cables. Use the pentalobe screwdriver to remove the screws from the bottom case, then gently lift off the bottom cover using the plastic spudger to avoid damaging any internal components.
- Battery Replacement: Locate the battery connector and carefully disconnect it from the logic board using the spudger. Remove the screws holding the battery in place, then carefully lift out the old battery and replace it with the new one, ensuring the connector is securely attached to the logic board.
- Reassembly: Once the new battery is installed, replace the screws to secure it and reattach the bottom cover of the MacBook Air. Finally, use the pentalobe screwdriver to fasten the screws back in place and power on your device to ensure the new battery is functioning correctly.