Great Batteries! These last a long time. I use these in my insulin pump and also flashlights. My pump runs 24/7 and with the Energizer alkaline batteries I usually get 3-4 weeks from them. These lithium give me at least double that time! I've been using them in my pump ever since they came out. Highly recommend!

I have only used a couple of them so far with no issues. I purchased the Energizers, having been a long-time customer of another major brand, which I needn't name here, but they have a copper top, because I have had several leakages, both in use and even still in the package. They assert a 10 year shelf-life. That hasn't happened recently. So, I am switching brands. I hope Energizer's 25 year shelf-life means they will last at least long enough to put them into service.

I doubt this review will get posted but I'm going to write it anyway. Sam's Club used to have a good price on these batteries, but not any longer. The batteries deserve a five star rating for their performance and longevity, but get two stars knocked off for overpricing. These can be found MUCH CHEAPER elsewhere. Final word: SHOP!

Energizer Ultimate Lithium AA Batteries are the kind of batteries you buy once and then forget about because they last that long. They're lightweight, reliable, and perfect for anything you don't want dying on you—remotes, controllers, flashlights, you name it. They hold up incredibly well compared to regular batteries, and you can really tell the difference in how long they keep devices running. Even though they cost a bit more, the performance makes it worth it. Honestly, when a battery lasts this long, what's not to love?

These are some of the best batteries you can buy. They last forever. I have been buying them the last couple years to put in my battery powered window lights for Christmas. They last basically from thanksgiving to after Christmas when I take the lights down and still have power left in them.

In the hopes of having my battery operated Christmas lights last throughout the season, I purchased an 18 pak of the AA Energizer ultimate lithium batteries. I bought these from my local Sam's Club. My light strands were either fairy or micro led lights and required 3 AA batteries each. The number of led bulbs ranged from 18 (micro) to 30 (fairy lights). I used all 18 lithium batteries in 6 strands. These were all on timers (5-6 hours) and I wouldn't consider them as high drain. Much to my surprise, they only lasted a little over a week. The regular AA alkaline Energizer batteries at least lasted two or more weeks. How do you explain this? The packaging claims "%231 longest lasting batteries". I paid $34.99 for this pack of 18 batteries !!! That was $10.00 more than a 48 pack of regular AA Energizer alkaline batteries. This was a total waste of money and I definitely don't recommend! Not sure if this is typical or I just purchased a bad batch of batteries. I sent an email to Energizer customer support for their input.

I've used Energizer Ultimate Lithium AA batteries in different devices, and they've been very reliable. The power feels consistent, and the batteries perform steadily without sudden drops. The packaging is easy to open and store, and it keeps the batteries organized. They hold up well over time, which makes them convenient to keep on hand for later use. Overall, they offer good value for dependable performance.

Too pricey and lack of performance.

Not a good buy batteries run out once a week

These batteries are some of the best available