ok, there was certainly a problem with my L2D runtime in turbo mode (35mins and sudden fading to 1/3 of initial output) and so i mailed fenix-store for some answers. Of course they suggested i'd send it back on my own postage fees, so i figured what the heck, i'll order a new one with not much higher cost. And guess what, new L2D just came, tested them out both in the cold (7oC) side by side old and new one, and yep, they acted as real twins, sudden dimming at the same time, less than 30sec time gap!!! The light bodies are only tepid at that point, overheating regulation can't be an excuse.. What's happening guys, i couldn't possibly be twice that unfortunate with technical defects! where's the claimed 150mins turbo run?