I'm a bit perplexed with my father in law's 240Z. We backed it out of the garage this morning for the first time since the fall, and hooked up the battery charger. The battery charged at about 2.7-3.0 amps for about a half hour so we tried to turn it over. The starter clicked repeatedly (like it does when your battery is too low to turn it over). Probably a bad battery, we thought. So we put the car on a boosting charger to try to get it started, and when the boost kicked in, it did the same thing. I bridged the posts on the solenoid with a screwdriver, and it only hummed and did not turn over. Any ideas? Any help is appreciated!