I put a fully charged 26650 battery into the Fenix PD40R (V1) flashlight and the turbo only lasted for a short while before dropping to the lower output. I can't get it back to turbo mode. Why is this happening?Updated 2 years ago

The Fenix PD40R (V1) is only able to reach the full output of 3000 lumens with a fully charged 26650 battery. It's not meant to stay on the turbo mode for very long. Once the battery is even partially drained, the PD40R (V1) will be unable to reach the 3000 lumen output again until the battery is recharged.