I also purchased a new hellcat with the hex wasp sight. Zeroed and it shooting great. Battery died after 30 days. Replaced with a new ever ready lithium battery. I checked to make sure that it was actually dimming. It was, new battery died after 30 days again. Emailed Sa. They sent a return number. I sent it back. Took about a week to get there. Received email from SA that it would be 2-4 weeks to get it back. Love the sight but hate that there are more having the same issues. Hope they have found what is causing this.