the craddle plugs to the outside pins (thoose little metal holes on the sides of the plug
i don't believe it will work, since they are connected to the same place...
unless your contacts are rusty... if that is reason of not working, then you can probably use the craddle,
but i wouldn't waste my money on a craddle...
since you have several chargers, and to don't spend money on a craddle that probably will be useless, i would cut the wires on one of the chargers, and use them on the craddle pins...
just to make sure it charges... the problem is knowing which is negative and positive.. (should be the same sides as the normal plug...)