AA Ultra Lithium Battery (Pack of 4), 3000mAh 1.5V, Longest-Lasting AA Battery, Up to 10 Years in Storage and No Leaks Guaranteed, Works in Extreme Temperatures, Non Rechargeable

U-tec provides a quality product. Their customer support is excellent.

I’ve been using this battery daily for a while now, and I’m honestly impressed. It holds a charge way longer than others I’ve tried!

I've rated the U-tec AA Ultra Lithium Batteries highly. To be honest I've only used the U-tecs for a few months, so for me to give a 5 star rating for Longevity and Battery life is misleading at this point in time.I'm using the U-tec AA Lithium Batteries in Blink cameras. The Blinks are fairly sensitive to the type of battery used. Blink recommends only Lithium AA cells. The Blinks come with the Energizers AA batteries. I've used the Energizers for 5+ years as replacement cells in the Blinks. In the last couple of years, it appears to me the quality of the Energizers has become erratic. I've needed to replace batteries in the Blink cameras after a few months. Often when I test the Energizer batteries that I'm replacing, one cell is good the second second is weak. Both batteries out of a camera should "fail" equally fast. They often don't seem to. That's the reason I'm switching away from the Energizers to the U-tecs. So far the U-tecs seem good. But I need a couple of years of experience with the U-tecs to see if they really and truly are up to the task of powering the Blink cameras.

They replaced the defective unit free of cost I changed the rating to 4 from 1 based on their customer support. Let’s see how the new unit works.————-I bought u-bolt-pro-WiFi by u-etc back in March 2024. The app recommended that I need to buy u-tec lithium batteries too for better performance. Two and a half months later, my lock stopped working. Called support and they suggested, I should just use normal alkaline batteries. The lithium batteries are u-tec branded. What a waste of money. He would refund or send me replacement batteries.

5 out of 5 stars - Exceptional Performance and Long-Lasting!I'm thoroughly impressed with the U-tec AA Ultra Lithium Battery (Pack of 4)! I've been using them in my Blink camera for a month now, and they're still going strong! The battery life is incredibly long-lasting, and I'm blown away by their performance.These batteries have exceeded my expectations, and I'm so glad I made the switch. The fact that they're still powering my camera after a month is a testament to their quality and reliability.Highly recommended! If you're looking for batteries that will keep your devices running for an extended period, look no further than U-tec AA Ultra Lithium Batteries. They're a game-changer for the price!

These are awful batteries, and the company that makes them is even worse.After a short few months of use one of the batteries died, or rather changed polarity. Fortunately I had the key with me, otherwise I would have been locked out of my house. No battery warnings on the lock’s app neither (the lock is also from the same manufacturer as the batteries).Emailed the manufacturer twice from Amazon.com, and thus far no reply. What if I had a problem with the lock itself?Subsequently another battery died (or more, as this time I did not check them with a voltmeter), so now I replaced all 4 batteries with alkalines.A manufacturer should stand for its products, rather than ignore their customers. This one seems to opt for the latter.

My digital door-lock needs 4 AA batteries to run and as usual I was using alkaline AA batteries. Unfortunately, these batteries do not last long enough (maybe due to heavy usage in our door system). Frustrating, I opted for these lithium batteries to try on. It was costlier than Alkaline ones - no doubt. But, four months have passed, batteries are running strong till today. It is surely four times more durable over normal AAs. I am sure it would run for a few more months, too. And in comparison, cost wise, it is better too.I will go for these lithium batteries of this make, once again when needed.

Hi all,UPDATE: I thought I would write an update on the batteries from U-tec. While the batteries didn't last long, the company wrote me and asked me how they can better support me with the batteries, and they sent me another set of batteries for free. That's above and beyond service. Thank you U-tech!Thoughts these would have been perfect to fit my current U'tech key lock entry, but these batteries lasted less than a month. Any regular batteries work just as good or better.