My car is going to be in a small car show at school tomorrow, my dilemma is leaving the compter on without running the battery dead. My though would be to hook a battery charger to the battery to keep it charged. My question is what type of settings should I put the charger on? I believe there are three options, all 12V with varying current: jumpstart(which assume I would not use), quick charge, and trickle charge. Any thoughts as to which setting would work to keep everything going without the battery dieing? Thanks.