I don't know. My 6-cell C-cell Mag I wore as a side baton because I rode patrol on a bike quite a bit and it was a little shorter than a PR-24. It was used its fair share in daily duties, survived two slides on the bike (a recovered wipeout where the bike is damaged), cracked a few skulls and the only thing I have ever replaced were bulbs. It is ugly enough from all the scratches and missing paint we used to joke about its appearance alone being a deterrent. This one is 33 years old and still working perfectly. My smaller 2-cell AAA lights have had the switch button replaced a couple times but to be fair they are on/off much more and treated roughly. They are at least 20 years old so no complaints.