The result is the PD35 and I have to say ...... HAMMER! That's a lot of light which flows from this small part, exactly what I had imagined. As regards duration of the batteries, I can not have much to say - the lamp is not in continuous operation, but at the evening dog running after a great thing to occasionally illuminate paths or to search for legacies ...... .Oh, and what else a criterion was the extremely practical "tactical limit" - no idea what it is "tactically", but to use the thumb switch makes handling the bargain very comfortable. 75 ne small penlight is at first glance certainly a lot - but absolutely justified in performance!