
I would be crazy to know that tire inflators are mains power only. If you find yourself on the side of the road with a dead and dead battery, you're out of luck. I'm glad I have this cordless tire inflator in my car for this reason. The likelihood of this ever happening is very slim, hopefully never, but it's a great peace of mind. However, I tested it at home and it's quite powerful for its size. Works well, easy to carry and very useful for airing bike tires. It is worth buying in my book.