My first one lasted around 3 years before an accident involving seawater and an unintentional dive to it happened. ^^
I ordered another one past December which after 6 months of use started that very same problem (power button stuck and not working).
I was inside guarantee so I had a replacement one which after 7 months too now has the same problem (power button stick and not working).
Before I check whether I’m eligible to have it replaced/repaired I was too considering voiding its warranty and trying to fix it myself. I have fixed a lot of flashlights with broken on/off buttons but I need to some sort of verification about that button’s nature.
Here are some pictures before completely disassembling it, I won’t void its warranty before I see all of my options.
So, @TexasBob do you remember at all how did you reach that button?