Learn: How To Figure Out If A Macbook Power Adapter Or The Battery Has Gone Bad?

Martin Wilson

Jul 27, 2022

Macbook’s Damaged Battery Or Power Adapter

Your laptop won't charge properly when you plug in the adapter. Your Mac may occasionally ring to let you know that you are connected to power, but other times, you may need to disconnect and replug your laptop or turn it on. Why is that? The three separate parts that make up battery charging must be identified through troubleshooting to determine which part is malfunctioning.

The Battery

Apple has already offered notifications and information on laptop batteries' state and health for several macOS versions. When it detects that something is active in a battery, macOS notifies you. If you're using macOS Catalina or an earlier version, you can click the Option-click icon in the menu to learn a little more about the battery's state of health. A tonne of information on the battery's status is available by default when using macOS Big Sur. Still, if you go to the Battery settings pane, click Battery, then Battery Health, the information is even more hidden. Big Sur displays the battery's current metrics but not its health. To see this, choose Battery Preferences. The condition will be displayed as Normal, yet when the battery's capacity is lowered to a specific level (which Apple doesn't specify), the battery can show Service Battery.

Low Battery Run-Time

Do you recall the first time you removed your shiny new MacBook? Did you ever lose sight of the lovely feeling of freedom you experienced when you could spend the day drinking wherever you pleased? Do you find it difficult to spend the few minutes it takes for your MacBook to charge? Perhaps now is the ideal moment to get a new battery. Your battery's charge level is completely up to you, though some individuals like to keep things warm. If you'd want a more subdued MacBook experience, A decent rule of thumb would be to replace the batteries when the remaining runtime is only about 25% of the new runtime.

Unexpected Shutdowns

Not just iPhones experience unexpected shutdowns. When a battery reaches the end of its useful life, all of our battery-powered products have the potential to shut down suddenly. If your MacBook shuts down at a time you don't want could be due to the empty battery. You must change the battery if this occurs regularly and after charging the gadget. The MacBook will also turn itself off if it becomes too hot or if it is unable to fix some problems. When you connect your laptop, inspect it to see whether the shutdowns are due to battery problems.


If you can't handle the heat, think about getting the MacBook a different power supply. It is more challenging than the alternative. Numerous hardware and software problems could cause your MacBook to overheat. However, a bad battery could be to blame if your MacBook frequently overheats while carrying out straightforward chores (especially if it exhibits any of these symptoms).

The Adapter

Examine the power adapter for wear and tear, such as broken or damaged parts, damaged or fraying cable insulation, bent or bloated AC connector blades, crooked or filthy laptop connection components, or other signals of difficulty, is common. However, even if a regularly used adapter may appear to be in good condition to the naked eye, the wiring, electronics, and other parts of the power conversion component that handle the conversion of AC to DC may be close to being discarded. Check to see if you can borrow a comparable or identical adapter from someone else temporarily if your computer isn't charging rapidly or consistently after plugging into your adapter. A generous return policy at an online retailer makes it possible to get a replacement. If you discover that it is the root of the issue, you can also keep it.

Power Source

Verify that the power adapter is plugged into an active power outlet. To ensure the device is powered on properly, unplug the power adapter from the outlet power supply and then plug it into any known-good appliance, such as a lamp or clock. Try charging your Mac if your outlet is functional, and you can attach your power adapter. Close your Mac and turn off the screen for 30 seconds if it isn't charging. Restart the display after that, and then attempt charging your Mac again.

Adapter's Wattage

Use a power adapter rated for the wattage of your notebook computer, making sure to use the right one. Use the power adapter and cable with the Mac notebook to charge your device for the best results.

Line Noise Issues

Alternating currents go through cycles, but these circuits may experience severe distortion because of the distance electricity must travel and electromagnetic interference from other surrounding devices. That is until the electricity is converted into a form that the battery in your laptop cannot use. You can determine if you have a line noise problem by unplugging the charger and letting it sit without being used for around 60 seconds. Reconnect it to the charger and verify that it is operating properly.


Sparks may be visible when you plug the power adapter into the wall socket. This is typical and expected when you plug electrical equipment into a live outlet. The adapter has been destroyed if the spark originates from somewhere other than the plug's blades or you see discoloration on it.


How to figure out if a MacBook power adapter or the battery has gone bad? If not, the final step is to locate a service. We suggest you find a place to repair parts or provide used components. Due to the powerful integration in most of Apple's laptops, buying an entirely brand new subsystem or motherboard could be costly, even though a pre-owned one could be just as good.

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