Yesterday, a neighbor of mine lost his house and everthing he owns when his house burned down. The fire started in the garage where he was charging a car battery. Thank goodness no one was hurt, but the house was a total loss. A couple of seconds before the fire started I heard some loud bangs, and then the garage was engulfed in flames. The fire departments suspects the charger or the batteries were to blame. My question is: how safe is it to charge boat batteries in your garage? I have an onboard battery charger and charge them in my attached garage as soon as I get back from the lake. After my neighbor's experience, I am now rethinking that. Nobody could have stopped what happened to his house even if he were closely monitoring the charging.