What flashlight component cuts off li-ion batteries at 3 Volts?

Hey, I just had a quick question about the components in flashlight design.

I understand that there is a circuit protecting li-ion batteries that cuts them of before they reach like 2.8V or something, otherwise the battery might be permanently damaged.

I also understand that there is need for redundant safety built in to flashlights, as many people do not trust the quality of the protected cells.

So what is the component or components in the flashlights circuitry that actually cuts off voltage? For a while I thought it is the buck/boost driver, but that's for regulating the current output. is there another component that is specifically designed to act as a safety switch?


Thank you for your help!

The cell's own protection circuit may do this. Some drivers have a 'lowest operating voltage' above the danger point for Li-Ions. Others have a voltage sensor that cuts the light off (Or reduces output) at low voltages.