Terralux TT-1 accepted voltage?

Hey guys!
I have a Terralux TT-1 (250 Lumens ) Uses 1 x CR123 battery
And while I love this little thing I hate the fact that it eats expensive cr123’s. I wanted to find out if anyone knew what the accepted voltage range of this light is?
I have 3.2v K2 Lifepo4 16340 cells so I was hoping to use this .
At 3.2v these are 0.2v above the recommended 3v(cr123) input voltage. In reality I’m guessing after charging these will be over 3.2 ,more like 3.7-3.9 but I’m not covert knowledgeable in batteries.
Any help would of be most appreciated!

I’ve tried thst but no use. I’ve been searching for ages now.