Portable battery starter - safety


#1

I have a portable battery starter that I love - saved me a couple of times.



I would like to leave it in the car, plugged into a 12 volt socket.



However, I live in blazing San Antonio and I’m concerned about how safe it will be inside a car that can get pretty hot.


#2

The company that manufactured or sold this device is probably the best source of accurate information on it.

Is there a customer service phone number on a label on this device?
Or, did the paperwork that came with the device have a customer service phone number?