I had a button stick on one of mine today. First it stuck on and I took the carto off it then it wouldn't fire at all. Then when you did hit the button without an atty attached the button would stay lit for probably ten seconds. I had just put a freshly filled carto on it and I think some juice may have got past the center post seal.
I got it cleaned out and I think it's working okay, though.
Well, it happened again and I'm convinced it ain't juice in the switch, I think the circuit board in this one is a little iffy. I just sent Brent an email and am confident we'll get things straightened out. I'm still *really* happy with these batteries and Brent's level of service