Robert C

I have a MC clone and I am getting ready to build my own battery pack. What is the max voltage, the voltage that the indicator turns to red at, and the voltage that light cuts out at?

(if it will take 12vdc then this gets real easy. . . except that 12vdc is really 13.8vdc . . .)

Robert C

I know it is generally poor form to respond to oneself; however, there are a lot of people looking at this and no responses.

So far it is pretty clear that:
Vin for normal operation is 7.2VDC and Vmax is 8VDC. I still don't have V(warning) and V(off)

vol

I'm total layman but doing a favor to give a first response : The descriptions say the battery pack is 4.2V. Is that what you need? or maybe not, since you should have known it.

Spld cyclist

I'm not a real expert on these lights and batteries, but I've picked up some knowledge. I've been testing voltages on a weak 4-cell 18650 pack lately, as I try to decide whether I need to replace it. Most of these lights seem to take nominal 8.4 volt packs. When this one was new, it charged up to, or near, 8.4 volts. The charger is 8.4 volts, which is fairly typical. Charging to greater than 8.4 volts may damage the batteries. (18650 cells, like many lithium cells are typically rated max 4.2 volts, and there are two in series to make up 8.4 volts.) My light turns red when the pack is putting out about 7.4 volts or a little lower (lithium cells are mostly out of charge at 3.7 volts). It turns flashing red around 7.0 volts, and turns itself off soon thereafter.