I have purchased a lot of batteries on Groupon! I didn't really pay much attention to the quality of the batteries. This time I did. And I'm sad to say that these suck. The price is great. But, I've had some not even last 2 weeks in a light with a timer. None of them have lasted a month in regular conditions. I even checked the expiration date; which is extremely long on batteries (02/2028). I don't remember the Westinghouse batteries I purchased in the past being this bad. Even though I didn't pay much attention in the past; I don't remember any battery performing this poorly. Maybe somebody bought them out and doesn't really care about quality anymore. It wouldn't be the first time that has happened. Good luck in the future.