Verified answer

If you have to go over your grass twice to cut it, the problem is either you have a dull blade or you are going too long between cuts. 

When grass it too long, you end up with blades of grass that are laid down and even held down by the front edge of the lawnmower deck, which is lower than the lawnmower blade and thus prevents it from reaching the blade to be cut. That's not a problem that comes from having to cheap of an electric lawnmowers. You'll run into that problem with all lawnmowers, gas or electric, high quality or low quality, expensive or cheap, because making a lawnmower without a deck in front that comes below the level of the lawnmower blade is illegal for safety reasons.

How you can tell it's a problem with your blade is if a few hours later you look down individual swaths the lawnmower made and see a pattern to the bits that are long, like the grass being shorter in the center and longer towards where the wheels passed or the long bits forming a line or a stripe that repeatedly runs the length of swath after swath. 

Just get a good gas mower with a Briggs and Straton engine. They start on the first pull and little force is necessary.

my experience is that none of them do.  the only solution with an electric is to cut a narrower swath or go much slower.  I've had the same one for a decade now.