... with stainless steel pressure ring for better protecting LED light,the surface anode hard oxidation treatment to the ... ),capacity: 4400 mAh,voltage: 8.4V,providing one rubber ring for the wired switch and the professional fixed ... the power is more than 10%,the green light will be on;when the power is less ... ,you can fast remove or install the bicycle light,fixed on the bike more easily,very convenient ...