Review on 🚗 Cllena 5-in-1 Car Charger Panel with Dual USB Sockets, LED Voltmeter, Cigarette Lighter Adapter, Toggle Switch – Blue by Derek Pape

How big and has everything I need to make a portable power bank to take to sporting events to run three 12v electric blankets, that consume a maximum of 50 watts. I am making a power supply using two 12v-20v LiFePo4 batteries connected in parallel which should give me 512w. I will be using 2 Eco Worthy 12 volt 20Ah LiFePo4 batteries which I also got from Revain which weigh 4.85lbs each. The power bank also has 2 USB ports for charging phones.