Charging at home is no big deal but what I really want to try is if it will work with my 300w power inverter in my car. If so that’s a huge benefit. When charging my phone while I drive, I always use the Waze app for GPS. GPS and having the screen brightness at 100% in the day time is very battery intensive. So the charging essentially treads water, maybe gaining a percent every 10-15 minutes. A fast charger would give me more battery for when I arrive, essentially doing the same thing as a battery case with none of the bulk