I have had the best all around luck with Energizer batteries. When I install them I usually write on them, with a Sharpie, the install date. A new twist that seems to be occurring is, for example, the flashlight going dim. Usually in what seems not enough on time for their use to be over. I have taken to testing each battery by itself and find one of the group has gone bad-less than 3/4 of a volt. I just replace one and I'm good to go. A good way to test them is with the Radio Shack meter #22-813. It's not a real precise meter but for quick all around use I can recommend it. HTH Gary