To be "portable", it shouldn't need
casters, and should have enough handles that none of the people carrying it has a load of
more than 100 pounds.
Sure, if you mean "human" portable. That is * one * definition.
When asked by an interviewer about how much the
"portable battery pack" would weigh, he responded that that was how much your
car weighs.
Source please? (That's not what Lee told me last year.)
BTW, Lee is currently hospitalized in Redwood City;
prognosis is uncertain.
Sigh .... I wasn't going to mention that here.