apple 2016 macbook pro charger brick 85w magsafe 2

What is the difference between MagSafe and magsafe 2?

For example, you can safely use an 85W power adapter (for MacBook Pro) on a MacBook Air (which requires only 45W) or MacBook (which requires 65W). The way Apple power adapters are designed is that you can use any charger on any laptop that has the same, or lower, power rating. The circuitry that controls the charge rate and cutoff are built into the laptop itself, and doesn't care what the power source is.īeside above, do all Macbooks have the same charger? You should not use a 45W with the MacBook Pro 13 since that is lower than its 60W requirement.īeside above, can you use an 85w charger on a MacBook Pro 13? Originally Answered: Is it safe to charge a MacBook ( Pro 13') with an 85W MagSafe charger? Yes, it is safe to use a higher wattage power adapter than your model shipped with. MacBook Pro (Retina, 15 inch, Mid 2015) MacBook Pro (Retina, 15-inch, Mid 2014) MacBook Pro (Retina, 15-inch, Late 2013) Macbook Pro (Retina, 15-inch, Early 2013) MacBook Pro (Retina, Mid 2012)Ĩ5W MagSafe power adapter with MagSafe 2 style connectorīeside this, what charger does my MacBook Pro use?įor instance, the MacBook Pro 13 inch uses a 60W MagSafe, but you can use an 85W MagSafe to charge or power it (although it will not charge any faster). It also explains why if you measure the charger output with a voltmeter, you don't find much voltage.Computers that use the 85W MagSafe 2 Adapter This process explains why there is a delay of a second after you connect the charger before the light turns on and the computer indicates the battery is charging. The Mac switches on the appropriate LED on the connector using the 1-Wire protocol. If the Mac is happy with the charger ID, it switches the power input to the internal power conversion circuit and starts using the input power.

The Mac detects the full voltage on the power input and reads the.

Microprocessor inside the charger to control this and other charger (14.85 to 20 volts depending on model and wattage).

(A short or a significant load will not enable the charger.)Īfter exactly one second, the charger switches to full voltage The charger detects the power input has been pulled low, but not too.When the Magsafe connector is plugged into the Mac, the Mac appliesĪ resistive load (e.g.

On the power pins (3 volts for Magsafe 2). The charger provides a very low current (about 100 ♚) 6 volt signal.I believe the following steps take place:

When the Magsafe connector is plugged into a Mac, a lot more happens than you might expect. A good description can be found at Teardown and exploration of Apple's Magsafe connectorīelow is taken verbatim from the above link.

Apple 2016 macbook pro charger brick 85w magsafe 2