Same.
I've looked around, but I can only seem to find ones that have an internal Li ion battery. Being that I live in Texas
EDIT - I'd like to not leave any Li ion batteries that aren't properly thermally managed. And while I'm sure most consumer gear will not have problems, I'd rather not risk it.
I'm using this: https://www.amazon.com/AUKEY-Dashbo...rd_wg=QNz5d&psc=1&refRID=7H5FQ2VM34W0DG4P8E9X according to description, it's using capacitor:
Powered by your standard car 12/24V socket via the included dual-port USB car charger (with spare port to charge your phone) and internal supercapacitor. Automatically powers on and starts recording when you start your car and stops when you switch off the engine. The supercapacitor withstands extreme heat & cold better than standard battery technology and has a far longer operational lifetime