Ok I found this on dvice.com

Green Wheel gives any bike an electric push

I want one of these because when I go on my bike ride on the bike trail I usually go 11-18 miles and sometimes the bike trail has these hills (that they put in intentionally to give you a workout) but I’m so tired that I just can’t make it up.  This will help.

Also I think it would help me get to the bike trail with no effort on my part then get me back home from the bike trail in 1 piece.  Usually by the time I get home from my bike ride 2 hours later I can barely walk, especially if I haven’t been riding in a while so while I’m letting it take me home my legs are resting so I can actually walk to the bathroom instead of using a walker.