12 volt high ampere battery charger. With this charger, large batteries from 15 to 200 amperes can be charged very easily. Since the transformer is large, it charges quickly. It has a voltmeter in front so you can tell what voltage it is charging at. I made it for my own use. I used to charge 200 ampere auto-rickshaw batteries with this. I bought an IPS so I don't need it anymore.