well i got some new interstate batteries, hook them up and 1 engine starts right away the other all i can hear is the silenoid click, so first thing i do is take off the exhaust and get to the starter. I hook a battery pack up the the starter itself to try and get it to turn, no luck. Next, i pull out my trusty dusty hammer, wack it a few times and clean the terminal off. Try starting it and it starts right up. Has this happened to anyone and how long do they usually last after wacking them to get them to work.