A battery wtf?
 

So... Got a new venom RC car 8.4v for my AEG... (3000mah), converted it to deans, plugged into my M16, and no sound. Then I plugged it into my AK, that fired fine, then I plugged it without the normal fuse/extension into my m16, that fired fine. With the extension/fuse, i plugged in my 9.6v G&P batt, that worked fine, as did it without the extension, and on my AK.
I'm completely stumped, the only thing I can think of is incompatiblity with the plugs. The extension uses modify deans, the mechbox wire uses G&P deans, the battery and the AK uses genuine deans. What the hell is going on?!

fixed
resoldered with genuine deans, works like a charm.