A battery pack is provided with an improved charger interface through the use a contact carrier assembly. The non-conductive contact carrier aligns and retains a plurality of charger contacts. The carrier aligns a first portion of each charger contact along a back surface of the battery pack housing and further facilitates alignment of another portion of each charger contact within bottom apertures of the housing thereby allowing each contact to extend across perpendicular back and bottom surfaces of the housing with improved ruggedness. Improved sealing is also provided by sealing the back of the carrier.