This $40 Automotive Jump Starter Can Also Inflate Your Tires

Update 2: Available again, with a backorder

Update: Sold out

USB-powered automotive jump starters might be the new hotness, but this Stanley battery maintainer trades portability for a key feature: A built-in air compressor.

Just like those compact jump starters, this thing can give your car a jolt without flagging down a fellow traveler from a jump, but it can also inflate your tires from anywhere. That means no more fumbling for quarters at a gas station, just to have the air compressor turn off before you could get to all of your tires. I keep one of these in my trunk, and I love it.

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