low emf/rf rechargeable or battery powered fan?

Its getting hot in the car. I can only crack the windows for safety.  Also trying to block any possible snoring from me I guess.

A lot of people like the O2 Cool fans. I've tried their model with two D cells and found it to be OK, not great. It runs fine on rechargeables.

You can also use a computer case fan powered by a 12V battery, and if you're handy you can make a filter

Thank-you!!