Panasonic パナソニックNCR20700 パナソニック NCR20700B 4.25Ah 15A is the most cost effective battery cell they’ve created the Japanese company in year 2017. It costs the same like to produce also NCR18650s but offers 30% more power with only like about 10% size increase! Dimensions: 20,35 x 70,3 mm.     http://www.uavfpvbattery.com