Modern USB-C-powered MacBooks lack charging indicators on their charging cables, as any USB-C cable works. If the charging cable is connected correctly, but the MacBook Pro is not charging, then the power adapter, or the cable itself, may be defective and needs replacing. If your MacBook was made prior to 2016 and has a magnetic charging cable (even an old L-shaped one), then your MacBook will have a light at the end of the cable that indicates that it is charging. Older MacBook Pros (made before 2016) used that same magnetic charging cable, which also has an indicator light.
Modern MacBooks (made in 2016 or later) use the standard USB-C charging cable. In the newest MacBooks, which have USB-C charging ports, the battery charging terminals and data communications lines are no longer located on the same connector. A USB Type-C charger does not have an indicator light, which means that if you are MacBook is not turning on, you might not know whether your battery is to blame, or whether the cord is simply broken.
If the flat battery is causing the MacBook Air or MacBook Pro not to turn on, most Macs will power up automatically when you plug in your working charger. Unlike the other MacBooks, these models of Macbook will not normally turn on without the working battery connected, even when you plug in the working charger. Even if your MacBook does not turn on, it should still have the lights turned on, as long as the issue is not the battery.
If your chargers light does not come on, the cause of the MacBooks failure to turn on or charge may be the defective plug. If you try charging your battery, but nothing happens, then the battery in your MacBook may be bad and cannot charge at all. Lithium-ion batteries, such as those in your MacBook, do not like being left with no charge at all for a very long time.
|Battery Issue||There is an issue with the battery of your Mac|
|Power Adapter Issue||If the MacBook is not charging, then the power adapter, or the cable itself, may be defective and needs replacing|
|Charger Issue||The charger which you are using should be working properly|
The reduction means that if you leave your MacBook connected to a charger at all times, you may find that when you decide to actually use the MacBook off of its battery, it does not last as long as it used to. It is entirely possible you could be decreasing your MacBooks batterys max charging capacity by keeping your battery connected to the charger all the time.
If your MacBook battery keeps losing its charge, or simply does not retain its charge for as long as it used to, there are some things you should look into. If you are fixing your broken MacBook, checking whether or not you can get the charge is a way of ruling out a battery problem. There are several ways you can test to see why the laptop might not be getting any power.
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With the MacBook Air connected to the wall socket, check for a status light (available on some Macs) that indicates the power supply is connected. Use the right power adapter for the MacBook model to recharge the Mac for around 5 minutes. Check power outlets If power outlets are working, plug in a USB-C power adapter and try charging the MacBook Air. To charge your Macs battery, plug your USB-C power adapter into a power outlet, and then plug your USB-C to MagSafe 3 cable into the power adapter and into the USB-C port on the MacBook.
Start by running all of the power cables to their ends, to make sure that they are securely connected to power and to the back of the Mac.
If they are, ensure your power cables are connected to power outlets that have a grounded tri-pronged plug. All MacBook chargers have removable plugs, so you can use one from another charger or from the Apple Power adapter extender cord to check whether the defective plug is responsible. While it is possible that the MacBooks charging cable will still function after suffering a few minor damages, this could be the reason for charging stability and security issues. If you believe that your MacBook charging cable is not working, check it for physical flaws such as exposed wires, cracked plugs, or extreme bending.
If it does not reveal anything, the MacBook may be failing to communicate battery status, perhaps due to a hardware failure at either the power connector or logic board. If the battery status indicator is just a partly-to-fully charged bar, then your MacBook Pro is not actively charging.
If the MacBook is not charging yet, your battery may have been damaged beyond repair. An overnight charge does not harm MacBook Air, but if you are typically using it with a plugged-in power cable, MacBooks battery might have lost its ability to stay charged for as long as it needs to. Your MacBook will learn the habit, and it will delay charging the battery past 80 percent until the final hours of the morning, so the battery cells will spend less time at 100 percent.
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Optimized battery charging delays charging the battery beyond 80 percent when it anticipates you will be plugged in for a long time, aiming to recharge your battery before you plug it out. Depending on your specific model, and if the battery is powered on or off, there are several different ways you can make sure that it is charged. If Apples laptop charger is working properly, you can leave it as-is, but you also can optimize the MacBooks battery life: simply use the iStat menus and Endurance to make sure your Macs energy is running smooth. You can use both power adapters over and below a certain wattage, but if you are using a lower-wattage charger, your MacBook might be charging slower.
Remove the keyboard connector and the battery from the logic board, and plug the Macs charger into its charging port. If you see the Green or Orange lights at the MagSafe connector, that means that both your charger and SMC on the MacBook are working right now. Pay attention to the power light on your MacSafe, if the light is orange/amber, that means your MacBook Air is charging right now.
How long does a dead laptop take to charge?
Depending on the laptop, the charging time varies. If the laptop is ExpressChargeTM compatible, the battery should charge to more than 80% of its capacity in approximately an hour and reach its full capacity in about two hours while the laptop is turned off.