As you all know i have an 07 Roush Blackjack that is not driven much during the winter months, is it normal for the battery to be going bad in only 2 1/2 years? I have gone to start it up several times recently and each time it is completely dead...the windows don't even come down when you open the door and it make no sound to start whatsoever. I jump it and let it run for 30 minutes and then shut it off and try again a week later and it's dead again. Any help or suggestions are greatly appreciated.
my mechanic is suggesting a high performance battery that will run like 190; do i need that much battery?