Isn’t it just a transformer to convert AC power to DC? [Ken Shirriff] answers all of this and more, and you may be surprised by what he found. As it turns out, the Macbook charger isn’t just a ...

The new MacBook ... as the charger that comes with the new MacBook Pro 15-inch. Other chargers (like the 61W version that comes with the 13-inch) can be used, they just won’t charge so fast.