Charlie - do you realize that one Deans Connector is twice the weight of the entire mCX

baurwin - many have noted about connectors not working as they should. try bending the pins ever so slightly and you should get it to work... I had a hard time getting the battery to mount into the charger until I discovered thatt by putting a slight bit of forward pressure (that is, leaning the top of the battery towards me) as I pushed down, got it to seat properly.