I am not sure how widely know this is so please dont kill me over it but...
If you have Vector 3 pedals Garmin will send you, free of charge, the battery caps and circuit board with the new battery terminals free of charge. This is assuming Garmin has not yet send you battery caps in the past.
I have two sets of Vector 3 pedals and they are sending me 4 of the Vector 3 small parts kit (one kit per pedal). I called with every intent on buying them and was pleasantly surprised when the costumer service rep let me know he was going to zero the order out so I have the new design of caps and battery terminals.
I am in the US to your mileage will vary in other areas.