These non orthogonal slots, when coupling to corresponding non orthogonal rails in the pocket of a battery charger, allow batteries of {TAIL ~ various sizes} to be inserted into a single charger pocket with reliable and consistent electrical connections between the electrical contacts of {HEAD ~ the pocket} and the charging terminals of the battery 
These non orthogonal slots , when coupling to corresponding non orthogonal rails in the pocket of a battery charger , allow batteries of { TAIL ~ various sizes } to be inserted into a single charger pocket with reliable and consistent electrical connections between the electrical contacts of { HEAD ~ the pocket } and the charging terminals of the battery
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH