Gun Light, CR123 or CR2, Need LiFePO4 EXACTLY 3.25 V - 3.30 V

Batteries and Chargers Rechargeable Batteries
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On one of my Streamlight flashlights this is on the package

For 4x 123s vs 2x 18650. but they don’t list the capicity of their 18650s.
I got 1:22 on high with 2x Sammy 30Qs before dropping off the regulated output.
They list 2:30 at 1000L on 123s vs 3h on 18650s
All the Best,
Jeff

Did a review here