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Power adapters for Mac notebooks are available in 29W, 30W, 45W, 60W, 61W, 85W, 87W, and 96W varieties. You should use the appropriate wattage power adapter for your Mac notebook. You can use a compatible higher wattage power adapter without issue, but it won't make your computer charge faster or operate differently. If you use a power adapter that is lower in wattage than the adapter that came with your Mac, it won't provide enough power to your computer.

Mac notebooks that charge via USB-C come with an Apple USB-C Power Adapter with detachable AC plug (or 'duckhead'), and a USB-C Charge Cable.

Mac notebooks that charge via MagSafe come with an AC adapter with MagSafe connector and detachable AC plug, and an AC cable.

The images below show the style of adapter that comes with each MacBook, MacBook Pro, and MacBook Air. If you're not sure which model Mac you have, use these articles:

USB-C

Apple 29W or 30W USB-C Power Adapter and USB-C Charge Cable

• MacBook models introduced in 2015 or later

Apple 30W USB-C Power Adapter and USB-C Charge Cable

• MacBook Air models introduced in 2018 or later

Apple 61W USB-C Power Adapter and USB-C Charge Cable

• 13-inch MacBook Pro models introduced in 2016 or later

Apple 87W USB-C Power Adapter and USB-C Charge Cable

• 15-inch MacBook Pro models introduced in 2016 or later

Apple 96W USB-C Power Adapter and USB-C Charge Cable

• 16-inch MacBook Pro models introduced in 2019

Make sure you're using the correct USB-C charge cable

For the best charging experience, you should use the USB-C charge cable that comes with your Mac notebook. If you use a higher wattage USB-C cable, your Mac will still charge normally. USB-C cables rated for 29W or 30W will work with any USB-C power adapter, but won't provide enough power when connected to a power adapter that is more than 61W, such as the 96W USB-C Power Adapter.

You can verify that you're using the correct version of the Apple USB-C Charge Cable with your Mac notebook and its USB-C AC Adapter. The cable's serial number is printed on its external housing, next to the words 'Designed by Apple in California. Assembled in China.'

• If the first three characters of the serial number are C4M or FL4, the cable is for use with an Apple USB-C Power Adapter up to 61W.
• If the first three characters of the serial number are DLC, CTC, FTL, or G0J, the cable is for use with an Apple USB-C Power Adapter up to 100W.
• If the cable says 'Designed by Apple in California. Assembled in China' but has no serial number, you might be eligible for a replacement USB-C charge cable.

MagSafe 2

85W MagSafe power adapter with MagSafe 2 style connector

• 15-inch MacBook Pro models introduced in 2012 through 2015

60W MagSafe power adapter with MagSafe 2 style connector

• 13-inch MacBook Pro models introduced in 2012 through 2015

45W MagSafe power adapter with MagSafe 2 style connector

• MacBook Air models introduced in 2012 through 2017

About the MagSafe to MagSafe 2 Converter

If you have an older MagSafe adapter, you can use it with newer Mac computers that have MagSafe 2 ports using a MagSafe to MagSafe 2 Converter (shown).

MagSafe 'L' and 'T' shaped adapters

60W MagSafe power adapter with 'T' style connector

• 13-inch MacBook Pro models introduced in 2009
• MacBook models introduced in 2006 through mid 2009

60W MagSafe power adapter with 'L' style connector

• 13-inch MacBook Pro models introduced in 2010 through 2012
• MacBook models introduced in late 2009 through 2010

85W MagSafe power adapter with 'T' style connector

• 15-inch MacBook Pro models introduced in 2006 through 2009
• 17-inch MacBook Pro models introduced in 2006 through 2009

85W MagSafe power adapter with 'L' style connector

• 15-inch MacBook Pro models introduced in 2010 through 2012
• 17-inch MacBook Pro models introduced in 2010 through 2011

45W MagSafe power adapter with 'L' style connector

• 13-inch MacBook Air models introduced in 2008 through 2011*
• 11-inch MacBook Air models introduced in 2010 through 2011

* Adapters that shipped with the MacBook Air (Original), MacBook Air (Late 2008), and MacBook Air (Mid 2009) are not recommended for use with MacBook Air (Late 2010) models. When possible, use your computer's original adapter or a newer adapter.

Learn more

You can get extra or replacement adapters with AC cord and plug at the Apple Online Store, an Apple Reseller, or an Apple Store.

A replacement adapter might not be the same size, color, shape, or wattage as the original adapter that came with your computer. But it should power and charge your Mac like the adapter that originally came with your computer.

If you need help using your MagSafe adapter, see Apple Portables: Troubleshooting power adapters.

If you're looking for a PowerPC-based power adapter, see PowerPC-based Apple Portables: Identifying the right power adapter and power cord.

Watts Up For Laptop Charger

I've determined power usage on my desktop and on my server, but I hadn't gotten around to testing the power usage of my laptop. As battery life is always a concern with a laptop, I was particularly curious to see which parts of the laptop draw the most power. So I ran a few tests with my trusty kill-a-watt on my Dell Inspiron 300m. It's an ultaportable 2 pound laptop of late 2003 vintage with the following specs:

• Intel Pentium M 1.2GHz low voltage processor
• 640 megabytes of RAM
• 60 gigabyte hard drive
• 12.1' 1024x768 LCD screen
• Windows XP Pro

Let's start with some baselines:

All subsequent tests were run with the laptop connected to AC power and the battery physically removed from the machine.

How much power does the LCD display use?

How much power does the hard drive use?

How much power does the onboard WiFi use?

How much power does the CPU use?

Whatsapp For Laptop 32 Bit

How much power does the integrated video use?

Running 3dMark2001 produced a peak power usage of 29 watts. We can subtract the Prime95 number of 26 watts -- which is entirely CPU-only-- to estimate about three watts are used exclusively by the integrated Intel 'extreme'* video hardware.

Bear in mind the kill-a-watt is only accurate to plus or minus a watt. And these are all rough figures based on a sample size of one laptop. But I think the rules here can be generalized to most laptops.

Watts Up For Laptop Power Cords

Here's what I learned:

1. The CPU is, by far, the biggest consumer of power in a laptop. No surprise there. If you want to drain your battery lickety-split, run a bunch of apps that peg your CPU at 100 percent.
2. Putting your hard drive to sleep isn't worth it. Ever. You save a whopping.. single watt. Why bother?
3. For maximum battery life, dim your screen. I was surprised that the screen alone accounted for 25% of the total power draw of my laptop at idle. You can moderate use of WiFi or your hard drive, but you can't exactly moderate the use of your screen. Plan accordingly.

Of course, your mileage may vary.

* it's extreme, all right. Extremely crappy.