At 12.8mm deep, the magnetic connector can be plugged into the MacBook and left there. Then, you just touch the accompanying six foot power cable as you would on a MacBook Pro or Air to charge your device up. The only hitch is that the cable runs $40 and it doesn't come with a USB-C power adapter, so you'll need to use the one that came with your MacBook. Also, it won't help if you need a free port while charging -- for that, you'll require Apple's (badly rated) $79 dongle. If none of that discourages you, Griffin says the Breaksafe power cable will arrive in April.