Energizer Ultimate Lithium

Energizer Ultimate Lithium AA batteries have been around for years, which makes them a safe and reliable choice, you know exactly what you’re getting. They have a strong reputation, and that’s one of the main reasons I chose them. I just received and installed these in my smart front door lock, where dependable power is essential. The last thing you want is your lock failing due to weak batteries, so choosing a trusted brand really matters here. They are definitely more expensive than standard batteries, but for something as important as home security, it’s absolutely worth it. Reliability matters more than saving a few dollars. So far, everything is working perfectly, and based on the brand’s reputation, I feel confident they will last. If you want peace of mind for important devices, this is a great choice.

I think these are without a doubt, the best AA batteries you can buy, even though they are pricey. They have a crazy long shelf life, are much lighter than normal alkaline batteries and most importantly, have higher output/life than alkalines. The thing I like best about them is that they cannot leak acid out and ruin/damage the battery contacts of whatever device you have them in! That is a great advantage in my opinion and makes these more or less mandatory for any "important" device you have. I don't know how many times I've had regular alkalines in something and come back after some length of time and find one or more of them oozing white crusty acidic material and have corroded the battery tray contacts. These lithiums won't do that! Since they're lighter than alkalines, that's always helpful for whatever device you use them in since weight usually matters, if it is something portable. These batteries also last a lot longer than alkalines and so are great for things that are in hard-to-reach places (smoke detectors, temperature sensors, thermostats, etc.) that you don't want to be changing batteries frequently. They are pricey compared to bulk alkalines and if you are burning through batteries, these might not be justified, but if you have anything important you want to power, I'd highly recommend these. You won't be disappointed.

We use these Energizer Ultimate Lithium AA batteries in our Kwikset Halo deadbolts, and the battery life has been amazing. With regular generic alkaline batteries, we were replacing them every couple of months. After switching to these, they are still showing 100% battery life after 3 months of use. They definitely work better than generic batteries, especially in high-drain devices. If you have something that goes through batteries quickly, these are absolutely worth trying. Yes, they cost more upfront, but the longevity more than makes up for it. Highly recommend.

I use a electric shaver that runs on two AA batteries. The shaver is more powerful and runs far longer, perhaps twice as long. Well worth the additional cost.

These Energizer Ultimate Lithium AA batteries are incredibly dependable, especially for devices that need consistent, long‑term power. They last noticeably longer than standard alkaline batteries, and they hold up beautifully in cold weather — perfect for flashlights, outdoor gear, cameras, and anything you don’t want dying at the wrong moment. They’re lightweight, leak‑resistant, and maintain strong performance even after long storage. If you rely on battery‑powered devices or just want something you don’t have to replace constantly, these are absolutely worth it. If you want power you can trust, these are some of the best AA batteries you can buy.

Best lithium batteries on the market, end of story. Only downside is they're price but when you consider the performance, it's easy to justify when the need is there I've used these in everything from my carbon monoxide and smoke detectors to trimmers to trail cameras in the brutal cold Minnesota winters and they've always had great performance results

Great batteries. Lasts a long time. Great fit, perfect size. Good value and great connection.

These are great. I use them in my security cameras. They last a few months with the cameras running 24/7. I now have them on subscription delivery so I never run out.