I bought an older version of this. I've had it for about 15 years. I had to replace the battery once, but this was due to my abuse of the original. It contains a reasonably sized battery with enough capacity to do anything/everything you could ever want to do with one of these,... and due it twice.
• Ideal for inflating car tires, bike tires, sports balls, air mattresses and other recreational equipment
• Store in your trunk - perfect for emergency roadside tire inflation
• Recharges at home (using 120 volt adapter) or from your car battery (using 12 volt adapter)
• Includes 12 volt outlet that will power 12-volt televisions, radios, cellular phones, lights and similar appliances
• Built-in tire pressure gauge so you can easily check pressure
• Includes light for nighttime and roadside emergencies
• Indicator lights show when battery needs recharging
• Includes cooling fan for extended life and reliability