Cree XM-L2 LED; Powered by a 550mAh RCR123 customized battery of five times discharging rate, giving a maximum output up to 900 lumens.
The flashlight can be charged through the magnetic contact charging port (other batteries may also be used in S1R, but cannot be charged)
New 750mA portable USB charging cable.Brightness increases or decreases gradually: when the flashlight is switched on/off, it will light up or fade gradually to protect eyes from the stimulation caused by sudden brightness changes