With the battery leads connected I tried connecting the wires to the screw terminal.when the + lead touched the + terminal there was a flash.the wire in the fuse is completely melted.
I have a Honeywell ade gen4 alarm system installed which is working fine. But every time I try to connect ,12v 2.1ah back up battery it blows the 1.6al 250v quick blow battery fuse. anyone no why?