6 Geeky Gifts You (and Your Valentine) Will Love

This is magic in an iPhone case. The popSLATE ($129) for iPhone 5, 5S, and 6 protects your phone just like other cases, but it also gives that phone a second screen without killing battery life. The popSLATE app lets you put vital information on the popSLATE eink case screen that resides on the back of your phone. Send maps, boarding passes, to-do lists, or even the photos that get you through the day to the popSLATE screen, and don't give a second thought to how much "regular phone" battery you're using.

— Kelly Schwarze, associate editor