So many of us have a tendency to run late for appointments. Whether you’re heading to your computer for a video chat or you’re running out the door to meet up with friends, you’re likely running because you’re tardy. When you’re scrambling to figure out what’s going on, how your hair looks, if you have the correct shoes, whether or not your notebook for your meeting is in your bag, your phone or tablet may be dead. The last thing you need when you’re running late is to show up with a device and charge that won’t last. That’s why you need to bring along a power bank. Having a power bank in your bag or pocket will help you charge your devices when you may have forgotten to previously. It also help you extend the life of your batteries if you’re out all day and won’t be near an outlet. Not all power banks are the same, so we’ve got the scoop on the best ones. See our picks below for the best power banks on the market.