This invention includes {TAIL ~ a battery pack} having an improved battery retention system for coupling to {HEAD ~ another device}, like a desktop charger 
This invention includes { TAIL ~ a battery pack } having an improved battery retention system for coupling to { HEAD ~ another device } , like a desktop charger
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH