Way back, wasn't there a change in the P3 end cap? A different spring or something? I seem to recall someone, @AstroTurf perhaps, who posted pictures of each and found I had the older version.
Edit, found what I was looking for: The Beta units went out with a much smaller spring and the change occurred pre-production to the larger spring.
Yep, the beta had the v2.5 end cap and spring. I upgraded to a Provarinati end cap, effectively making mine a production model. I wasn't aware the spring was update yet again.
ETA: What's been bugging me is the when I put in a fresh battery it's been showing the % in the 80s. If it was just one battery I would chalk it up to the battery being old, but it's happening with almost all of them, including the new one with the black stripe.
18650? The larger the battery, the higher the internal resistance, and the lower the battery % tends to be. Also, what's your IQ? No, not YOURS, the P3? Lower IQ will result in a lower battery level. One of the flaws in the IQ feature is that it doesn't take into account the different internal resistances of different cells, IMHO. IQ always tends to be significantly higher, the smaller the battery.