Not being able to start your car is a drag. Dead batteries only seem to happen at the worst possible times. Instead of having to beg a jump off of your neighbors and/or random people in parking lots, get the Genius Boost Plus, the portable jump starter for your car.
You can carry this with you in your vehicle, just remember to keep it charged up. Once charged, it can give you up to 20 jumps per charge. Which, if you need to use it that many time on the same car, it might just be time to replace the batter.
It works on a variety of vehicles so that you can keep it moving even when the battery tries to call it quits. It can also be used as a backup battery pack for mobile devices, just plug in a USB cord. Don’t try to jump your phone. That’s a bad idea. You can get one of these for $124.95.