Gadgets for use in your car are very handy when you’re out driving around, but when you’re at home and discover you need to use that sort of gadget, it feels kind of stupid to go out and run your car’s engine just to power some device. It probably doesn’t happen often, but this Car Lighter to Wall A/C Adapter will be priceless when it does.

Imagine you’re on a long driving trip and get to your hotel room only to discover your cellphone battery’s almost dead and you left the A/C charger home. Luckily, you brought your car charger and this adapter, so you can still charge your phone without having to sit in the car waiting for it. Hooray! $10 for this handy little gadget.