Air-conditioned or not, there often are times when you need a bit of air circulation to stay comfortable in your truck when you're done driving for the day. This battery-powered fan from Treva can do that, and not bust your budget in the process.
At about 10 inches square, the Treva is the right size to sit on the floor or table of your sleeper berth. It has two speeds so you get the amount of cool air you require.
The Treva takes six "D" batteries but also comes with an AC adaptor you can plug into you inverter.
Available online for $15.