I have a Spark with 4 batteries and controller in a nice case. I like to take it with me when I travel, but it can get really hot here in south Florida and I’m worried about leaving Spark in a hot car when parked. Any ideas how to keep the case and contents from getting too hot?

case in a coolbox with lots of ice cubes....

But then, when he goes to fly, it will complain the battery is too cold.

It's not free but they do make 12Vdc coolers where you can set the temperature you want to keep it at.
Here's an example: https://www.amazon.com/Igloo-403 ... 601936113&psc=1

Hello and good day. Thank you for that information and for reaching out. Leaving the drone inside the car might have an effect on the drone itself. The drone is made part plastic. We all know what happens when plastic and heat come together. Heat might also affect the internal components of the drone. Thank you for understanding and for your support.

Totally understand it is why I asked the question!

I am in the same boat living in sw florida. I never place the spark in my car and leave it!!!! I take it to work and place in locker then I go flying after work. You well know how hot it gets in a car quickly. Just saying do not take a chance