Macworld No matter where you are you can never have enough power to keep your devices charged. And today’s deal may be all you’ll ever need: Amazon is selling the Anker 321 Power Strip with three AC outlets, and three USB ports for just $15, a savings of $11 off Anker’s MSRP and the best price we’ve ever seen. This power strip is actually a power cube, with four sides of power: three sides have AC outlets for a MacBook and the fourth has two USB-S ports and one USB-C port for iPhones, iPads, Apple Watches, and AirPods. When used with a single device, the USB-C port will deliver 20W of power bu…