●MC12 support 3.7V Li-ion 16340, 3.7V RCR123A,3V CR123A batteries,160 hours runtime in moonlight mode. -But To ensure high performance, please choose IMR16340/RCR123A Li-ion + Button Top + Protection PCB rechargeable battery to operate. -MC12 also support to use primary batteries:3v CR123A Lithium battery in emergency(but please do not charge CR123A). ●5 working modes: High>Middle>Low>Moonlight>Strobe. -High output mode: 1000 lumens;105m beam;runs 65 minutes -Middle output mode:200 lumens; 46m beam; runs 160 minutes -Low output mode: 60 lumens; 25m beam; runs 9 hours -Strobe mode: 1000 lumens -Lockout mode can be activated on the side switch for accidental triggering protection, along with a low-voltage indicator underneath.