Ounces? I have no lack of muscle, weight isn't the problem it is about volume due to moving around a lot and particularly through airports and crowded flights.
This falls into a series of questions:
A) Do I know the location well, the hotel, meeting rooms, airport, etc or not. If I know it well then I take specific products for that location. Example is a frequent trip through a specific hotel, airport, meeting rooms, and then in that trip I take the Powerport5-USBC version as the distance between the power sockets and my devices does not exceed about 6 feet. If I do not know then I take a 12ft power extension cord and the Powerport4 and my phone's USB-C charger.
B) How long do I expect to need to power off-grid. If I know its going to be a long time off-grid then I take the Powercore 26800 which can power everything for a very long time. If I know I'm only going to have a few hours then I use the Powercore 10000.
C) How many gadgets, what are their power needs. This then steers me to Powerport2, Powerport5, or multiple devices, and the size of the Powercores I need, I have the Mini+, Slim, 10000, 26800.
So really this is about time away from wall sockets, and distances from wall sockets.