I have one of these mini dehumidifier's, and I love it. It can be left in the safe and doesn't get hot. It has an indicator that turns pink when it is time to recharge. Just plug it in for a few hours, and the light will turn blue, and your good to go.
Here is the link, I bought mine at a Cabela's store by my house:
http://www.cabelas.com/cabelas/en/te...0034792227686a
Thanks, Tony