Thunder ac6 problems..
 

So I have been charging my 2s and 3s lipo batteries with this charger. I hook everything up correcty and I try to charge either of the batteries I get a error [BATTERY VOL ERR CELL CONNECT] The weird thing is that the 2s lipo stopped working and got this error then I ran the 3s lipo and tried to charge it and got the same error. I was wondering if anyone has had this problem before and knows what is going on.

This is usually involves the order in which you connect things to the charger. Chargers can be sensitive due to internal components in how they're hooked up. Try hooking everything up with charger turned off and then turn it on.

May or may not help.