Hello Everyone, Just purchased my first P3 standard and excited for it to arrive. Question regarding field charging. I'm trying to pick the best option that doesn't include running my car. What I wanted to know for each option: How many times will these charge the batteries with the 57w charger? Time to charge to 100% with the 57w charger? Option 1: Car battery jumper with DC outlets port: 12 volt DC plug, max output 5amps Stanley 1000-Amp Peak Jump Starter with Compressor - Walmart.com Option 2. DC to AC power inverter I'm thinking of a 300W inverter, but what is recommended, any differences between 300w and 500w? Suggestions on what battery to run this off of? Car battery thats installed already or a secondary one? Option 3. Power bank with AC outlet AC Output 120 VAC, 60 Hz Maximum Power Output 65 W Xcellon 12,000mAh Power Bank with AC and USB Outlets PB-1200AC I would prefer to do option 1 or 3 so that I can also use the items for other purposes.