I either have a bad battery or an electrical drain. If it's an electrical drain I can't repair, I'll isolate it. I want to wire a switch in so that I can turn the power off from the battery. I would appreciate some suggestions. I'm thinking about buying this: http://www.batterybrain.com/batterybrain. But there's got to be a cheaper way I can mount a switch in the car (someplace convenient but out-of-the-way so I don't accidentally isolate the battery from the alternator while driving). Any ideas? I'd imagine it'd have to be a heavy-duty switch and fuse combo since it'd be right off the battery. If I can find the circuit, I'm hoping I can isolate just that circuit. Right now, the car's parked for winter. Yes, I know it might just be a bad battery, but I want to plan ahead for the worst. Thanks.