Is it ok to run a cell down to the point of tripping the pcb, or is it best to try and avoid this happening?
Cheers
Matt
Its better to avoid it. Most lights will get very dim when the battery is nearly empty, so you will notice it. If you take the cell out of the flashlight and you measure 3.6V, its pretty much empty.
Sometimes I did 
Hence, this is how the protection pcb protects the cell from further discharge /damage.
Thanks for the reply. I thought that was the case.
I just got an Olight S10 and tested its runtime until it starts to flicker at low voltage. The AW IMR 16340 read 2.5v when i removed it.
I wanted to test the runtime with a Yezl 16340 that has a pcb trip voltage of 2.45v, so the light ‘should’ flicker before the pcb trips, but i didn’t want to risk damaging the cell trying.
Cheers
Matt
The protection circuit is not a true substitute for safe Li-Ion handling procedures; it's there to prevent occasional over-discharge, overcharging, and shorting out.
Your cell's usable life will be cut short if consistently discharged to the point of tripping the low-voltage cutoff, in most cases.
One should own a DMM to verify that the charger and cell are behaving normally, IMO.
Such a cute Olight S10, how do you like it ?
Maybe I might get one to compliment my S35 :bigsmile:
Yeah i really like it, especially the button activation, as i prefer that to twisty’s 
I’m trying to decide if i should apply some heat to kill the magnet or not. I didn’t buy it for the magnet, and wonder if/how easily it might damage a credit card?
The S35 looks nice. The S10 is my first Olight, but i like it so far, so id probably buy another.
Cheers
Matt