Usually the most you can do for friend who has run out of battery in their phone is to offer them a charger cord. If you’re not in a spot where it can be plugged in, then there’s not anything you can do. At least there wasn’t. If you want to be a real friend, let them have some of your battery with the Juice Booster.

The Juice Booster is a life line for your phones. It attaches to your phone and lets your friend’s dead or dying cell syphon off your battery so it can keep going. It works with phones that use micro-USB and OTG. Which, thankfully, is most of your newer cell phones. Sorry people that are still using flip phones (why?).

This is the perfect solution for when you’re out and about and there are no outlets handy. As long as you’ve got a friend and the Juice Booster, you can get back in business. They don’t even really need to be your friend, they just have to have a smartphone. The Juice Booster is £10.