ButterFly SE 15W

This little thing replaced two chargers in my carry-on, and I love that it folds flat enough to slip into a side pocket. My watch and phone both topped up overnight, though the watch puck is a bit slow. For the size, it's genuinely hard to beat.

Used it on a four-day trip and it was the only charger I packed. The flip-out watch pad is what sold me, no extra cable needed for my Apple Watch. Charges my phone fast enough overnight without heating up.

Slips into my backpack's front pocket with room to spare, and charging both my phone and watch from one outlet when I travel is so nice. The magnet snaps the iPhone into place every time. Flew through a weekend trip without packing a second cable.