●Specifications  ●1800mAh high capacity, 6 hours long working duration,worry-free work. ●Compact and simple design,68g body weight,the diameter is only 33mm,small and lightweight.   &nb..

●Specifications ●1600mAh high capacity, 4-6 hours long working duration,worry-free work.●Compact and simple design,60g body weight,the diameter is only 32mm,small and lightweight,no sense of suff..