top of page


Public·19 members

Best Place To Buy Macbook Charger High Quality

Once you know which Mac charger you need, you might be wondering where to buy one. The most no-brainer option is, of course, visiting your local Apple store or ordering from But if you want to save a few dollars or get a special deal, you can also check some other places in the process.

best place to buy macbook charger

No matter how old or new your MacBook may be, chances are the computer will outlive its charger. Whether you yanked it accidentally, rolled over it with your desk chair, or it just stopped charging for no good reason, that MacBook charger never seems to last as long as the laptop it was meant to charge. If you're not sure how to go about it, we're here to explain how to get a replacement MacBook charger.

While it may seem obvious at first, choosing the correct MacBook charger is not as simple as you may think. Over the years, Apple has changed, tweaked, and altered its laptop charger numerous times, so it's best to double-check which charger your best MacBook needs. For example, the newest MacBook Air with M2 has a MagSafe charger, but older Macs may have a USB-C charger.

Check Apple's MacBook charger identification guide (opens in new tab) to best ascertain which charger you need. Pay attention to things like year and model for best results. If you're not sure which year or model your MacBook is, then you'll need to check under the Apple menu on your device:

Once you make a reservation, Apple's Genius Bar staff will be able to replace the MacBook charger if it's covered under warranty or help you buy a new one if it's not, occasionally even with a little discount depending on the situation.

Once it's been determined that replacement is absolutely necessary, you'll have to decide where you want to buy your MacBook charger. The charger you need (based on the determination you made in Step 1 above) will likely be sold wherever Apple products are sold. Here are a few of the most popular retailers of Apple products:

It's usually in your best interest to buy an official Apple charger whenever possible. One reason Apple's MacBook chargers are so expensive is because they have a ton of smart safeguards built in to prevent over-charging, over-heating, and electrical malfunctions. With that being said, sometimes an expensive Apple charger simply isn't in the budget. If that's the case, here are some tips for finding the right third-party charger:

Don't let a broken MacBook charger slow you down. By following a few quick steps, you can identify which charger you need and find out how to get a replacement MacBook charger as easily as possible. Even if it's not covered by warranty, there are many online stores and brands that sell replacement MacBook chargers to get your MacBook up and running again. Or if you'd rather go for a portable MacBook charger, check out our guide on the best portable chargers for MacBook.

The sleek gadget features both a microSD and full SD card reader. We think this is the best laptop USB-C hub available, and in fact, we use one every day to write reviews just like this one.More: All of the Best Accessories to Make Your iPad a MacBook Replacement

GoRoostr is the best place to sell your Apple devices. We take new, used or broken Apple products and give you money back for them right away! Our process to sell new or used Apple products is quick and easy.

Juice up your iPhone with one of the best iPhone chargers available. Top iPhone chargers are exactly what you need to get your iPhone back up to 100% in style and, more importantly, in no time. And, they are worth investing in especially if you're constantly using your phone.

We've divided this roundup into sections to help you further. First, there's chargers and charging blocks, then charging cables, and ending with wireless charging pads and car chargers. For other charging needs, our guides to the best power banks and best wireless chargers will help.

Still, if you're going to buy one, at least you know you'll get a quality product. It has that clean minimalist design that works so well for Apple devices, and it's incredibly simple to use, making it easily one of the best iPhone chargers. Obviously, don't expect it to come with a spare charging cable. That would be far too much like good value.

While it's commonplace to have power options when configuring desktops, it's out of the ordinary for laptops. Because of that, it might not be immediately clear which will be best for your needs. This list will give you a better idea of what each adapter offers so you can choose the best one for your needs.

MacBook chargers, including the MacBook Air USB-C power adapter, can generate a significant amount of heat when charging. If you place your charger somewhere insulated, like under a cushion, it can become too warm and turn off automatically. To keep your MacBook charging for longer, keep your power adapter cool by not placing things on top of it.

In certain extreme cases, the charger may melt, or emit the smell of burning plastic. You may also find the wires becoming frayed or burned. In these cases, the charger needs to be replaced immediately. Do not use a charger if it has any of these symptoms. If your computer is still under AppleCare, the charger should be replaced for you at no cost. If, however, your AppleCare has expired (or you refused to purchase it), then you may be required to pay for a new charger. Take your computer to the Apple Store and speak with a representative about replacing your charger. You may also get a discounted or free charger if your particular model was recalled, as was the case for some MagSafe chargers that were issued with MacBooks in 2008.

As anyone who has ever used a laptop likely knows, the chargers that plug into the power outlet frequently wear out more quickly than the laptops do. And when this happens, getting a functioning charger replacement quickly becomes a priority. Luckily, you can find reasonably priced MacBook Pro chargers and replacement power adapters on eBay.

When you first set out to purchase a replacement Apple MacBook charger online, you will probably notice that there are two major types of chargers available: new or used MacBook Pro chargers made by Apple and Apple-compatible chargers made by other companies. Generally speaking, the non-Apple chargers tend to be cheaper, but either will work. The most important thing is that the charger you choose is truly compatible with your computer.

You must understand that the methods that will be discussed are not a permanent solution for charging your MacBook. You can use them if you believe you are in trouble and require an immediate power source. If you have damaged your charger, you must proceed with the replacement.

Inside the Macbook charger. Many electronic components work together to provide smooth power to your laptop.Most consumer electronics, from your cell phone to your television, use a switching power supply to convert AC power from the wall to the low-voltage DC used by electronic circuits.The switching power supply gets its name because it switches power on and off thousands of times a second, which turns out to be a very efficient way to do this conversion.[1]Switching power supplies are now very cheap, but this wasn't always the case.In the 1950s, switching power supplies were complex and expensive, used in aerospace and satellite applications that needed small, lightweight power supplies.By the early 1970s, new high-voltage transistors and other technology improvements made switching power supplies much cheaper and they became widelyused in computers.[2]The introduction of a single-chip power supply controller in 1976 made switching power supplies simpler, smaller, and cheaper.Apple's involvement with switching power supplies goes back to 1977 when Apple's chief engineer Rod Holt designed a switching power supply for the Apple II.According to Steve Jobs:[3]"That switching power supply was as revolutionary as the Apple II logic board was. Rod doesn't get a lot of credit for this in the history books but he should. Every computer now uses switching power supplies, and they all rip off Rod Holt's design."This is a fantastic quote, but unfortunately it is entirely false.The switching power supply revolution happened before Apple came along, Apple's design was similar to earlier power supplies[4]and other computers don't use Rod Holt's design.Nevertheless, Apple has extensively used switching power supplies and pushes the limits of charger design with their compact, stylish and advanced chargers.Inside the chargerFor the teardown I started with a Macbook 85W power supply, model A1172, which is small enough to hold in your palm. The picture below shows several features that can help distinguish the charger from counterfeits: the Apple logo in the case, the metal (not plastic) ground pin on the right, and the serial number next to the ground pin.Apple 85W Macbook chargerStrange as it seems, the best technique I've found for opening a charger is to pound on a wood chisel all around the seam to crack it open. With the case opened, the metal heat sinks of the charger are visible. The heat sinks help cool the high-power semiconductors inside the charger. Inside the Apple 85W Macbook chargerThe other side of the charger shows the circuit board, with the power output at the bottom. Some of the tiny components are visible, but most of the circuitry is covered by the metal heat sink, held in place by yellow insulating tape.The circuit board inside the Apple 85W Macbook charger. At the right, screws firmly attach components to the heat sinks.After removing the metal heat sinks, the components of the charger are visible. These metal pieces give the charger a substantial heft, more than you'd expect from a small unit.Exploded view of the Apple 85W charger, showing the extensive metal heat sinks.The diagram below labels the main components of the charger.AC power enters the charger and is converted to DC.The PFC circuit (Power Factor Correction) improves efficiency by ensuring the load on the AC line is steady. The primary chops up the high-voltage DC from the PFC circuit and feeds it into the transformer. Finally, the secondary receives low-voltage power from the transformer and outputs smooth DC to the laptop.The next few sections discuss these circuits in more detail, so follow along with the diagram below.The components inside an Apple Macbook 85W power supply.AC enters the chargerAC power enters the charger through a removable AC plug.A big advantage of switching power supplies is they can be designed to run on a wide range of input voltages.By simply swapping the plug, the charger can be used in any region of the world, from European 240 volts at 50 Hertz to North American 120 volts at 60 Hz.The filter capacitors and inductors in the input stage prevent interference from exiting the charger through the power lines. The bridge rectifier contains four diodes, which convert the AC power into DC. (See this video for a great demonstration of how a full bridge rectifier works.)The input components in a Macbook charger. The diode bridge rectifier is attached to the metal heat sink with a clip.PFC: smoothing the power usageThe next step in the charger's operation is the Power Factor Correction circuit (PFC), labeled in purple.One problem with simple chargers is they only draw power during a small part of the AC cycle.[5]If too many devices do this, it causes problems for the power company.Regulations require larger chargers to use a technique called power factor correction so they use power more evenly.The PFC circuit uses a power transistor to precisely chop up the input AC tens of thousands of times a second; contrary to what you might expect, this makes the load on the AC line smoother. Two of the largest components in the charger are the inductor and PFC capacitor that help boost the voltage to about 380 volts DC.[6]The primary: chopping up the powerThe primary circuit is the heart of the charger.It takes the high voltage DC from the PFC circuit, chops it up and feeds it into the transformer to generate the charger's low-voltage output (16.5-18.5 volts). The charger uses an advanced design called a resonant controller, which lets the system operate at a very high frequency, up to 500 kilohertz. The higher frequency permits smaller components to be used for a more compact charger. The chip below controls the switching power supply.[7]The circuit board inside the Macbook charger. The chip in the middle controls the switching power supply circuit.The two drive transistors (in the overview diagram) alternately switch on and off to chop up the input voltage. The transformer and capacitor resonate at this frequency, smoothing the chopped-up input into a sine wave.The secondary: smooth, clean power outputThe secondary side of the circuit generates the output of the charger.The secondary receives power from the transformer and converts it DC with diodes. The filter capacitors smooth out the power, which leaves the charger through the output cable.The most important role of the secondary is to keep the dangerous high voltages in the rest of the charger away from the output, to avoid potentially fatal shocks.The isolation boundary marked in red on the earlier diagram indicates the separation between the high-voltage primary and the low-voltage secondary. The two sides are separated by a distance of about 6 mm, and only special components can cross this boundary.The transformer safely transmits power between the primary and the secondary by using magnetic fields instead of a direct electrical connection.The coils of wire inside the transformer are triple-insulated for safety.Cheap counterfeit chargers usually skimp on the insulation, posing a safety hazard.The optoisolator uses an internal beam of light to transmit a feedback signal between the secondary and primary. The control chip on the primary side uses this feedback signal to adjust the switching frequency to keep the output voltage stable.The output components in an Apple Macbook charger.The two power diodes are in front on the left. Behind them are three cylindrical filter capacitors.The microcontroller board is visible behind the capacitors.A powerful microprocessor in your charger?One unexpected component is a tiny circuit board with a microcontroller, which can be seen above.This 16-bit processor constantly monitors the charger's voltage and current.It enables the output when the charger is connected to a Macbook, disables the output when the charger is disconnected, and shuts the charger off if there is a problem.This processor is a Texas Instruments MSP430microcontroller,roughly as powerful as the processor inside the original Macintosh.[8]The microcontroller circuit board from an 85W Macbook power supply, on top of a quarter. The MPS430 processor monitors the charger's voltage and current.The square orange pads on the right are used to program software into the chip's flash memory during manufacturing.[9]The three-pin chip on the left (IC202) reduces the charger's 16.5 volts to the 3.3 volts required by the processor.[10]The charger's underside: many tiny componentsTurning the charger over reveals dozens of tiny components on the circuit board. The PFC controller chip and the power supply (SMPS) controller chip are the main integrated circuits controlling the charger.The voltage reference chip is responsible for keeping the voltage stable even as the temperature changes.[11]These chips are surrounded by tiny resistors, capacitors, diodes and other components.The output MOSFET transistor switches the power to the output on and off, as directed by the microcontroller. To the left of it, the current sense resistors measure the current flowing to the laptop.The printed circuit board from an Apple 85W Macbook power supply, showing the tiny components inside the charger.The isolation boundary (marked in red) separates the high voltage circuitry from the low voltage output components for safety.The dashed red line shows the isolation boundary that separates the low-voltage side (bottom right) from the high-voltage side.The optoisolators send control signals from the secondary side to the primary, shutting down the charger if there is a malfunction.[12]One reason the charger has more control components than a typical charger is its variable output voltage.To produce 60 watts, the charger provides 16.5 volts at 3.6 amps. For 85 watts, the voltage increases to 18.5 volts at 4.6 amps. This allows the charger to be compatible with lower-voltage 60 watt chargers, while still providing 85 watts for laptops that can use it.[13]As the current increases above 3.6 amps, the circuit gradually increases the output voltage. If the current increases too much, the charger abruptly shuts down around 90 watts.[14]Inside the Magsafe connectorThe magnetic Magsafe connector that plugs into the Macbook is more complex than you would expect. It has five spring-loaded pins (known as Pogo pins) to connect to the laptop. Two pins are power, two pins are ground, and the middle pin is a data connection to the laptop.The pins of a Magsafe 2 connector. The pins are arranged symmetrically, so the connector can be plugged in either way.Inside the Magsafe connector is a tiny chip thatinforms the laptop of the charger's serial number, type, and power.The laptop uses this data to determine if the charger is valid.This chip also controls the status LEDs.There is no data connection to the charger block itself; the data connection is only with the chip inside the connector.For more details, see my article on theMagsafe connector.The circuit board inside a Magsafe connector is very small. There are two LEDs on each side. The chip is a DS2413 1-Wire switch.Operation of the chargerYou may have noticed that when you plug the connector into a Macbook, it takes a second or two for the LED to light up. During this time, there are complex interactions between the Macbook, the charger, and the Magsafe connector.When the charger is disconnected from the laptop, the output transistor discussed earlier blocks the output power.[15]When the Magsafe connector is plugged into a Macbook, the laptoppulls the power line low.[16]The microcontroller in the charger detects this and after exactly one second enables the power output.The laptop then loads the charger information from the Magsafe connector chip.If all is well, the laptopstarts pulling power from the charger and sends a command through the data pin to light the appropriate connector LED.When the Magsafe connector is unplugged from the laptop, the microcontroller detects the loss of current flow and shuts off the power, which also extinguishes the LEDs.You might wonder why the Apple charger has all this complexity. Other laptop chargers simply provide 16 volts and when you plug it in, the computer uses the power. The main reason is for safety, to ensure that power isn't flowing until the connector is firmly attached to the laptop. This minimizes the risk of sparks or arcing while the Magsafe connector is being put into position.Why you shouldn't get a cheap chargerThe Macbook 85W charger costs $79 from Apple, but for $14 you can get a charger on eBay that looks identical. Do you get anything for the extra $65?I opened up an imitation Macbook charger to see how it compares with the genuine charger. From the outside, the charger looks just like an 85W Apple charger except it lacks the Apple name and logo.But looking inside reveals big differences.The photos below show the genuine Apple charger on the left and the imitation on the right. Inside the Apple 85W Macbook charger (left) vs an imitation charger (right). The genuine charger is crammed full of components, while the imitation has fewer parts.The imitation charger has about h