Turns out I did not need thus after all. The Iceco folks happily took it as a return.
My Iceco cooler gave me the E1 error code. After working with my Bluetti EB150 for about 2 weeks... it gave me the code. Put it away since I couldn't figure out anything. I tried changing the settings on the Iceco but had no luck with getting rid of the code. Saw this and hoped it would solve my problem but still get the E1 code.
Cigarette lighter plug does not stay seated in socket. Also it prevents plugging anything else into 12V without overloading.
This cooler has performed well. Absolutely recommend this product for car travel. Get the cooler cover too. Bought the DC-DC Booster just in case I needed it. Haven't had to use it.
just what i needed for my lithium batteries