Over on another forum I posted this when a person was wanting to install a fence and indicated that it was low budget. A cheap charger can be made from a turn signal flasher and a car coil. I am unsure of the amp draw if run on a battery but if you have access to AC a simple battery charger can power the homemade charger. I got this repy... Increadibly BAD idea. Don't do it. There is a lot more to a good charger than this. -Walter Speaking as an engineer and farmer. This then prompted a response by me which was not answered..... highlands .....Do not leave me in the dark! Elaborate on why it is an incredibly bad idea. Then a third person chimed in with this..... why dont we just go commando and cut the end off a lead cord and just hook up the hot wire..........might you want to use a ground fault outlet...lmao So here at the more technically qualified forum I am asking for information as to why a supposedly engineer would differentiate why the spark from a coil would be that much different from that of a fence charger?