I have a tire inflator designed to plug into a car's 12V cigarette-lighter socket. I mainly use it for my bicycle, but my car is parked far from my apartment, so I'd like to run the pump indoors from a normal wall outlet. What should I search for, and what specifications do I need to check? I'd prefer to keep using this pump because it's useful for both my car and bike.
4 Answers
Check the pump’s label, manual, or original packaging for its amperage rating. Choose a regulated 12V supply with equal or greater amperage, and verify the connector’s polarity if the specifications mention it. A supply rated too low may trip, run hot, or fail to start the pump.
Another option is a battery jump starter with a 12V accessory socket. You can connect the pump using an EC5-to-cigarette-lighter adapter, if the jump starter uses an EC5 output. That avoids running a cord across the apartment and can be useful for emergencies too.
A compact rechargeable bicycle inflator might be worth comparing against the cost and size of a high-current AC adapter. It would be more convenient indoors, although keeping the existing pump with a properly sized 12V supply should work fine.
Look for an AC-to-DC power supply with a 12V cigarette-lighter socket. The wall provides AC power, while the pump needs 12V DC. Make sure the supply can provide at least as much current as the pump requires; inflators can draw several amps, so a small, cheap adapter may overheat or shut off.
That’s exactly what I needed to search for—thanks!