You might have heard about Apple’s new dynamic charger that can deliver just the right amount of juice to your iPhone or Mac. You also might have heard that it’s pretty pricey at $39. Well, it just got its first discount, so if you’re curious about it, it’s a great time to buy one. The Apple 40W Dynamic Power Adapter with 60W max power is down to a cool $27 at Amazon, the best price we’ve ever seen.

We tested this power adapter a while back and were pleasantly surprised by its performance. Basically, this adapter features a unique dynamic power allocation system that’s capable of delivering up to 60W. It can sustain this 60W max power for about 20 minutes or so before getting too hot and backing off to 40W. We didn’t find it to be any faster than other 60W chargers, but the safety features are a nice benefit. And Apple could unlock featurea in future devices that specifically take advantage of the dynamic charging.

Either way, this technology allows it to provide a powerful boost in charging speeds while maintaining a compact, pocket-sized form factor. It will generally charge your iPhone at 40W, but it will boost to 60W for your MacBook Air (for a while, at least). The unit features a single USB-C port and foldable prongs, so it’s as travel-ready as it’s gonna get.

Go ahead and grab Apple’s new 40W/60W power adapter for $27 while it’s still on sale.