New way of jump starting your car.
No need to carry around jumper cables or waiting for some good Samaritan to help you.
There are a few brands around. Powerall and Genius Noco available at Amazon are probably the better made ones.
There are also chinese knock-offs available at aliexpress at much lower price.
But if you're driver or regularly going MY, you certainly should consider having one, just like having a spare tyre.
https://www.youtube.com/watch?feature=player_embedded&v=d3Mr7GYNa84