I didn't contact them, as the website is what I relied on to list what they are currently retailing.
If the lumens & size specs are appealing, setting for an eight hour runtime could be feasible... especially if USB-C equipped.
Because of improvements in capacitance the new 6 led tail light will run longer and brighter than the quad red on about the same size battery. I have the same tail light as 10 Wheels and switched to the quad red hoping it would work better for touring. The daytime red has a very large plug in charger and the quad red like the newer 6 led light has a USB C charging port. The new 6 led light is $199.00
I have my dinote mount above my dino tail light.