... circuits, three gears light circuit;A: Both XP-E R2 lights, current output 0.8A, the brightness of 400lm.B: ... .0A, the brightness of 1000lm.C: Three led all lights, with light output current 3.8A, the brightness 1400lm.3. ... between 6.8V, between the battery is low.*Yellow lights up,says voltage in 6.8V between 7.6V, ... half power.*Green lights up, says voltage in 7.6V between 8.25V, ...