... , ,electronic pen,point reading pen,mobile power,electronic cigarette , etc7.4v 700mAh Polymer li-ion Battery pack Adventage:Green product various dimensionsLow impendenceExcellent discharge performanceExcellent storage performance ... (C)Size (mm)Weight (g)3.7 V70 mAh15 C5.7*14.5*17.51.83.7 V90 mAh15 C6.5*15.5 ... .33.7 V 150 mAh15 C5.7*11.5*40.54.03.7 V 160 mAh15 C6.7*17.5*23.54.03.7 V ...