... driver Input voltage: 2.7-9.0DCV, work with 1-2 x18650, 2 x CR123A, 2x16340 batteriesConstant output current: ... /Q5/R5, SSC P4, Lumileds K2. Input voltage: 3.6-30DCV, work with 2-4 18650/CR123A, or ... : a single SSC P7, Cree MC-E, or 3 x Q5/R5 LEDs in series 2. Boost constant current ... 700,1000,2000,3000mA optionalLED used: 3-6 or more LEDs in series 3. Buck-Boost constant current driverInput voltage ...