Originally Posted by chicbicyclist
But yes, the electric kit is indespensable - on hills. Other than that, I only use it when I'm feeling lazy, or if I'm carrying 20 lbs of extra grocery weight, or if I want to keep up with faster traffic, other than that, I'll take the whole lane, make you wait in your car and there is nothing you can do about me(where parked cars are present, of course, im not that much of an ass). Or if I wanna confuse cagers with me riding up a hill without pedalling at all

How does this electric assist work? Where is the battery? In the bag on the rack? Isn't it heavy reducing somewhat the gains from extra power?