Woot offers Auto Joe 24-Volt IONMAX Cordless Portable Air Compressor Kit, w/ 2.0-Ah Battery, Charger, Storage Bag, and Nozzle Adapters (24V-AJC1-LTE-P1) for $24.99 (orig. $69.99) + free shipping with Amazon Prime.

Product Description:
When the air is low -- pump it up -- and Go With Joe! Skip the trip to the gas station and reach for the powerful portable air compressor that fits in the palm of your hand with the 24V-AJC1-LTE-P1 24-Volt Cordless Air Compressor from SUN JOE.Compact and convenient for camping, or commuting - it’s the power-packed rechargeable pump that’s perfect anywhere power is at a premium -- like at the park, at the pool, or on the road.
Keep tires at the perfect pressure, inflate a bike tire, pool float or sport ball in seconds. Simply set the PSI on the digital display and pull the trigger. The 24V-AJC1-LTE-P1 automatically stops at your preset pressure.Unlike bulky gas-powered or electric tools, SUN JOE’s 24-Volt cordless compressor employs the most advanced lithium-ion battery technology for no fade power, and peak performance under pressure! When the work is done, simply plug the battery in, power it up – and it’s recharged and ready for your next inflation project!
 

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  [VERSATILE]: Ideal for home, auto, sports equipment, air mattresses, camping
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  [LED]: Digital LED control for precise pressure
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  [AUTO SHUT-OFF]: Auto shut-off at preset pressure
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  [IONMAX]: Featuring exclusive IONMAX technology for no fade power and maximum performance
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  [INCLUDES]: Perfectly portable - stows neatly in trunk. Battery Charging Time (max) 300 min