Amazon.com has a Statpower Xantrex XPowerpack 300 plus 250-Watt Power Inverter for $49.99 with Free Shipping.
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- Integrated 20-amp-hour battery and 300-watt DC-to-AC power inverter n
- Built-in air compressor for inflating tires and small sporting equipment n
- Runs 115-volt AC or 12-volt DC products n
- Includes: jumper cables, nozzle adapters, AC charger, DC charging cable and accessory bag