>> pull off cart drop juice in atty. done
So you don't have to put the cart back on? Why did you need to take it off if it doesn't have to be put back on?
Just trying to get the apples to apples goin' here.
With a manual battery, it's pop end-cap and oring out (in same motion), drip juice on batting (as much as you want up to the max, in order to make it apples-to-apples, I'd use the same amount), cram oring and endcap back on with same motion. Notice since it was a manual, I didn't even bother to remove it from the battery.
This is, of course, not taking full advantage of the capabilities of the unit (ie. filling up half a day's worth of juice in one shot) but is demonstrating that it's every bit as fast.