Risk to run SF L4 with RCR123 3V?

[gigainternational]

RCR123 3V is not all the same among follow brands I have:

Ultralast 700mah RCR123 3V is about 3.4~3.6V after charged
Zukz 750mah RCR123 3V is about 3.6~3.9V
Tenergy 900mah RCR123 3V is about 4.2V

I'm not sure my L4 will be fried with these so called 3V rechargeable?
Now I just try to feed in the single cell light and wait until the battery dropped to about 3.2v then start to use in SF L4! Is this safe enough?

 

[alvdll]

I have a couple of 750mAh "brandless" (must be made in China) protected RCR123A that I use on my L2, they run for about 40mins on the L2 freshly recharged. But then again, I don't know prolonged use of such batteries would have any adverse effect on the Lux V emitter.

 

[Kai]

I believe the correct way is to measure them under load.