Zulfigar..Interesting..

I did install the reversed battery, it was showing 11.5 and I didnt notice because who would think?? but the meter showed a - sign..11.5 IN REVERSE..

I shorted it to drain, intermittently so as not to burn up the cables..or melt the posts..then when dead I charged from a charger capable of 50 plus amps..again intermittent because of heat..Got it holding a nice 12.75 and then charged again just a little and it all seems good!! No evidence of bad fuses but we will see..