Fixed the issue - simple old school knowledge - Holosun Rail Mounted Laser Sight

My previous review noted battery drain issues. And others also see battery issues. But I like this physical design. It’s nice and Holosun is quality gear. I found the water proof aluminum battery cap was coming into contact with the positive battery terminal. This sets up a redox reaction at the junction of the aluminum cap and steel battery terminal and drains the magic electrons from the battery. Sure enough the anodized surface on the aluminum cap was becoming discolored. So I cut a little circle of backing film from a sticker and placed it in the cap. No issues now with battery drain. I went to engineering school and I’m stubborn. I’ll give it 4 stars for design and compact solid body. They should fix the small detail in the cap with a dielectric material like I did. Easy fix.