If you don't already have a jump starter in the back of your car, you should get one. You never know when you'll be stranded without a friendly stranger around to assist. This two-in-one car jump starter and 8000mAh power bank from Roav is currently $25 off with the code ROAVR320 at checkout. It can jump-start your car 15 times on a single charge, is water-resistant, and features a bright, built-in LED (essential for jumping your car at night). It also has two USB charging ports for phones, tablets, and cameras.