hatesnow,
Do you know that e-zip has a knob(button) on throttle that you can switch from "pedal assist" mode to "turbo" mode? In pedal assist mode motor is not working until you start pedaling. In 'turbo' mode it works from stop.
Also, in cases when you think that battery disconnected try use switch on back of controler -I use to pull battery and push it back, but recently i found that in most cases i just need to use switch.