came across your post on led lights and their reliability. i work as a mechanic myself, for the past couple years i've been using an led flashlight that has been more reliable than any other light i've ever had. my guess is the mag light leds just arent of the quality required for daily rough service. try out a fenix P1D and get some rechargeable 123 batteries for it. super bright and small enough to leave in your pocket. i've droped mine countless times, 3 times it didnt work after being droped, those times the battery failed.