no, I have not done any runtime tests
its a tiny battery,
I dont expect it to last long on modes above moon (2 lm), low (18 lm), and medium (45 lm)

I think of it a bit like my Lumitop Tool w Nichia, maximum runtime on high (80 lm) is just 30 min. I dont use my lights on maximum modes for more than a few seconds.

The benefit of this Warm White High CRI light is the color rendering and color temperature, and beam quality.

High runtime and high brightness are qualities that favor Low CRI Cool White LEDs, neither of which interest me.

Since I use rechargeable batteries, runtime is not a high priority, for the way I use my lights. I do carry spare batteries, and, truth be told, I actually also carry spare lights :wink: