I bought my Dad a streamlight propolymer figuring that it would be a good light for him to handle and cheap batteries. The first one i bought stopped working in a week so i contacted the place i bought it and shipped it back and they refunded my money. My Dad said he wanted another one so i then ordered it from another company and he had it for 2 days and it stopped working. Any guesses why. I think it's the bulb but do the xennon bulbs just stop working or do they dim before they go out. Kind of a scary thought if you really need the light.