You need to buy an extral cord with Aviation connector.

No, you won’t be able to run Zero-Breeze without being plugged in if you don’t purchase the additional battery.

Using the Zero Breeze in a car or truck for short periods of time is ideal for use with the 12V battery.
Zero Breeze allows you to use AC in situations like waiting in the carpool line, eating lunch or grabbing a quick nap in your car during a work break. Of course, never leave your pet alone in a warm vehicle as this could lead to harm to your pet. For that reason, we do not recommend using the Zero Breeze for that purpose.

Its 120-150 Watt.

3.5 to 5 hours

No, ZeroBreeze will not release any gases.

Unlike most room or portable air conditioners, the Zero Breeze is not designed to cool an entire room to a set temperature. It is made specifically to cool the area right in front of the fan for more personal comfort for you and your guests. The temperature of the cool air from Zero Breeze can be 10F lower than ambient temperature.  

Make sure the power system can supply stable 12V, 15A DC power, ZeroBreeze will work.

No water or ice is needed, ZeroBreeze is a compressor air condictioner.

No. 

Life span of ZeroBreeze is designed to have 5-6 years.