Can't trust it - LaserMax Gripsense Laser

In practicality, it works as you'd want it to. The sad part is that it can't be trusted. I purchased this in April, and I'm about to change the battery for the 3rd time. It sits in a sticky holster, and it's for a warm-weather gun, so it's not used all the time. Now, I've lost trust in it, and I never know when it will fail. I've had a Crimson Trace in the past, and I debated getting that, but I heard good things about the Gripsense.
I called their customer support, thinking maybe it was a faulty laser. The woman answering the phone got an attitude and asked me if I changed the battery. I explained I only had it a couple of months, and it hadn't been used, and why would it die so fast? After arguing about it she reluctantly told me she'd send a battery. I told her not to bother since I had spare batteries and I'd try replacing it. My Crimson Trace lasted longer with a lot more range time. If you're going to purchase this, buy a lot of batteries. I chalk it up to a failed experiment and I'll move on.