Yeah that was an awesome idea and now they dont work anymore.
Story in a nutshell, while I was off in Louisiana Gator hunting my buddy Kurtis recharged a battery with a 110 socket. It was one of those electric clear airsoft guns. Sure enough the batteries were dead. He went and put both wires to them positive and negative still it got piping hot and boom the airsoft gun worked perfect again! Thats some balls to try that crap!