The battery life is supposed to be 65,000hrs mine dies in about a month.When I bought mine those Shield sighted ones weren't there, now they are announcing those are discontinued, but the Hex ones were always there. It's a little confusing. I've had mine for about 5 months I think.
The Hex is still working and holds its zero so it is not a bad sight at all. The battery replacement is a pain. You have to dismount it. Other than that, I like it fine.
There's a whole thread about that problem on another forum. SA is replacing those and the ones they've sent out lately are ok so far, although it will take more time to know whether or not they're really fixed. I know they can make them work, the one I have has lasted about 9 months now.The battery life is supposed to be 65,000hrs mine dies in about a month.