it doesn't matter how many times you have pressed this switch because to turn it off you have to press and hold it so as long as you have pressed this switch then in theory the light is on. If it has had three days charge and is turned on then bring it into a very dark situation so there is no light making it think it is daytime and if the light still does not turn on try using the remote control to turn it on (make sure the plastic tab has been removed from the battery compartment)
No these are purely solar powered lights.