Please note that this light is made only to work fully with the 550 mAh Olight RCR123 only and not the 650 mAh RCR123 shown in the "customers who bought this also bought" area. The 550 mAh RCR123 is a specialized IMR battery with positive and negative contacts on one end that allow for both a high current to power the max output as well as the built-in charging. A regular CR123 or RCR123 will work in the light, but you will not have access to all of the outputs or the built-in charging. An IMR RCR123 from another brand will work in the light, but you will not have access to the built-in charging.
The Olight S1R baton (S1R) is a side-switch, rechargeable EDC flashlight. Powered by a single specialized RCR123 rechargeable lithium battery (please note that you need this Olight RCR123, not the 650 mAh one), it has a maximum output of 900 lumens and utilizes a Cree XM-L2 LED. Coupled with a TIR optic lens for a high transmission rate, the S1R delivers a very balanced beam. The S1R has six brightness levels and a strobe mode, covering an output range of 0.5 to 900 lumens. The outer appearance of the S1R follows the same style of the BATON Series. It comes with a magnetic charging cable. You can use a desktop micro-dock as an optional charger, making it easier to charge whether at home or outdoors.