Question about LED lights, maybe the battery...

[_Shawn_]

I was playing my Fenix L1D on turbo. Intentionally running the battery down (lithium AA) to see what happens with a low battery. It started to flicker a little. I turned it off, and then back on and it would not come on. Not even on low.


I know it works fine with a new battery.

I assume that there is a little juice left in the battery and expected that the LED would at least give off a little light on low.

So, my question is why will it not come on at all, not even on low? Is this normal for LED lights or is it related to the lithium battery?


Thanks,

 

[Rossymeister]

If I remember correctly, It takes ''x'' amount of volts to ''fire'' an LED

This is totally normal.

 

[Gunner12]

Actually more like X volts to power the driver, but yes, the battery might have run too low.

 

[UnknownVT]

Fenix L1D on turbo. Intentionally running the battery down (lithium AA) to see what happens with a low battery. It started to flicker a little. I turned it off, and then back on and it would not come on. Not even on low.

The Fenix L1D has a spec'd voltage limit of 0.9V.

I've done this recently using the Fenix L1D-Q5 to deliberately run down some LSD NiMH batteries (Kodak Pre-Charged).

My battery came out of the flashlight at just < 0.9V and would not turn the light back on - but if I left it for a bit the voltage would climb back up and again would turn the light on again on Low and even to Medium but fail at High - then it would not turn back on again until the battery had rested and bounced back etc.

For example of that, please see second half of post #40 in
eneloop vs. Kodak Pre-Charged Voltage Maintenance