The above battery ran a color cycle pattern on 70 LEDs for 45 minutes using an inverter. When the car chargers come in I will compare times and report the difference and any other issues / information that may be helpful.
As per my last post - the car chargers work well. To save space I pulled off the end that goes into the cig socket and wired the black and red wires to the the 12v lithium icon battery mentioned in my last post. 4 of the chargers connected to the same 12v battery ran the suit for an hour. This is a 30% improvement over the inverter - with less space and no heat.
Not sure if this solution works for you, but reporting back as promised. Best of luck with your project.