Excellent optic despite slight discrepancy in stated battery life - Holosun HS503BU Micro Red Dot Sight

I just got my HS503BU for use on my Kel-Tec KSG. I actually got it to replace my HS503C, which is basically the same optic but with different features. Switching from the C to the BU on my home defense shotgun because the auto-adjusted brightness of the C changes the brightness based on the ambient lighting directly above you, which often makes it too dim when looking into bright areas, or too bright when looking into dark areas. Also having to manually switch it on is a drawback when you need to react quickly. The BU solves those issues for me.

As stated in the title, the battery life stated on both Optic Planet's and HoloSun's websites is "up to 50,000 hours," and the box states "50,000 hours with the Dot/20,000 hours with the Circle Dot." However the manual of the optic states that "due to use of new LED technology, the optic can be operated for up to 10,000 hours." It doesn't specify any difference based on which reticle you use. On a home defense gun that will likely be sitting still most of the time, that's not so big a deal, but it will probably be on most of the time while you're moving around with it, or while it's in your car. The super-long battery life was a pretty big selling point, and now I find out it might be up to 5x shorter than advertised. Kind of a bummer.

Besides that, the build quality is excellent, it feels sturdy, the shake-awake feature works as advertised, and there are plenty of brightness levels to find exactly what you need. When it activates automatically, it remembers your last-used setting.

It should be noted that the objective lens on this optic is "crooked." It's angled so the right side of the lens is farther back inside the body than the left side, and it's very noticeable. I was going to return it, but after looking at lots of photos online, including the ones on OpticsPlanet.com, it's clear that the lens is supposed to be that way. I even had another look at my HS503C and it's the same way! Apparently that slipped by me all this time.