Hey y'all I travel a lot in my truck, and will be sleeping in it at a few tournaments i have to go to this year. Problem is, i now have to run a CPAP machine off the battery all night (for sleep apnea). THe machine only draws 2.4 amps, 50-60hz of 120V power, but i really don't want to run this off my battery all night through an inverter and end up with a dead battery. So i think i am going to get a 2nd battery (optima?) with an isolator. Who's running 2 batteries with 1 stock alternator? Does it put a lot of stress on the alternator, or just make it take longer to charge? I'm not drawing any large amount of current (like extra lights or a winch), so could i get away with this setup? If so, who's got the best isolator out there? I want both batteries to charge, 1 to run everything, and 1 on reserve for jump starting myself. I remember looking into the hellroaring products on in the past that was on ORC, whats everyone's opinion on that? And for a second battery try, i know this was just disucssed, but ive got a 94. What trucks of my era came with a 2nd battery that i could try to get a tray out of? Preferably i'll get a new tray that will just bolt in, where could i get one like this for my "newer" truck? Currently my tray is just behind the grill on the passenger side. Thanks, sorry about the long post!