I have purchased THREE of these. Each one eventually, somehow, unscrewed in my pocket or purse and all I had left was the cap attached to my keys.The larger one I've had in my car for FIVE YEARS. It's excellent and I only changed the batteries ONCE and that was because I thought of it (but it was still bright).Do yourself a favor; buy the larger one instead of multiple tiny ones. Maglite is a great product, but they slipped with this one. YOU MAY REALLY NEED IT SOME DAY!