So I'm a new grower working out the kinks in my box. I want to install a computer fan to my box and have heard u can convert them by using a old cell charger or ac adapter as long as the amps match. My problem is I'm too strapped to pay $20 at radio shack and can't seem to find any amps on any of my adapters and the fan itself. I am wondering the dangers of using an adapter that doesn't match? Any tips would really help thanks!