I have had my LD20 (2xAA's, 200 lumens max) for about 9 years now.
It had a very easy life at first, $65 I was not going to let it get abused, thats what the $10 princess auto specials are for.
For the last 4 years or so its been put through allot more. With me everywhere in the field at work.
Keeps kicking ass.
I have been abusing it more and more kind of hoping it dies to be honest, so I can justify getting one of the many newer models (LD20 is discontinued now, but was their best selling flashlight in the 2008 era.)
Its lasted longer than most other electronics I have...
i keep mine in the truck,along with my k bar and a can of bear spray.
i'd kill for a nobel peace prize