Thanks for your kind words AussieKeys... much appreciated!
You've pretty much summed it up with the AC Power Supplies - yes, they're heavier but with the increase in weight also comes an increase in capability/usefulness! You no longer have to worry about finding the right type of 'connector' or dealing with the proper type of polarity, etc. The DC bricks (if you can even find a decent one out there) will power one device, while the AC power supply will power as many as you like (as long as you keep it under the total wattage the power supply offers). Also, the heavier the AC power supply weighs, the better it is (that translates to a much more capable battery in terms of Watt Hours).... how cool is that
Those RavPower DC units I recommended years ago were discontinued by RavPower.... I got sick of the entire DC power supply scene with the proper connectors, polarity, single-use, and finding it harder and harder to locate a decent unit (since RavPower stopped making them).
Anyway, much success with your quest to find a proper unit for you.
Cheers!