Originally Posted by Coolruns
What is the battery life like on the Lenser X21?
I am not a big fan of Ledlenser.
There are a lot of options depending on your preferred battery choice.
Something like the Fenix TK35 is a good option. It has various brightness levels.
820 lumens - 1 hour 33 minute runtime
346 lumens - 5 hour runtime
109 lumens - 16 hour runtime
12 lumens - 170 hour runtime
These are regulated meaning the brightness will remain constant even when the battery runs down.
If you have never seen a modern flashlight like this you will be amazed at the brightness. The low setting with a 16Hour battery life will still be brighter than a 4D Maglight.