Energizer Ultimate Lithium AAA Batteries, World’s Longest-Lasting AAA Battery in High-Tech Devices (4 pack)

Find helpful customer reviews and review ratings for Energizer Ultimate Lithium AAA Batteries, World's Longest-Lasting AAA Battery in High-Tech Devices (4 pack) Best Price:$7.09 – $30.30

Energizer Ultimate Lithium AAA Batteries, World's Longest-Lasting AAA Battery in High-Tech Devices (4 pack)

Lithium Cells are rapidly becoming the new gold standard for many household uses, from simple flashlights to sophisticated hybrid vehicles. These lithium-ion batteries are now ubiquitous at the retail level and their popularity has steadily increased because of their power efficiency compared to more traditional delivery technologies far surpassing carbon-zinc, nickel-cadmium, nickel-metal hydride and alkaline.

Here Is my Assessment of The Energizer AAA “Ultimate” Lithium:


1. Superior in power efficiency compared to above-cited technologies. Lithium cells hold their charge longer and become superior performers in retaining their charge. When stored properly (in a cool, dry and dark environment), these cells self-discharge rates are substantially slower compared with previous generations of batteries.

2. Unlike nickel-cadmium cells, lithium-ion batteries have no (or a very negligible) “memory” effect.

3. Lithium Cells appear less likely to leak and are not as vulnerable to extreme temperatures compared with previous technologies.

4. Lithium-Ion cells also perform better at lower ambient temperatures than their predecessors.

5. Lithium-Ion batteries are noticeably lighter than previous types of cells making it an additional plus in heavier types of equipment such as larger flashlights, power equipment, etc.

6. Energizer cells have expiration dates considerably longer because they discharge much more slowly compared to previous generations of batteries.

7. Lithium cells are more environmentally-compliant and friendly compared to previous generations, particularly those cells which contain toxic, heavy metals such as cadmium and mercury.


1. My rating on these cells is 4.5 stars due to the perceived steep price points of the Energizer brand that most folks believe. However, if you do the math, as another astute reviewer has, you will find that lithium cells are actually a more cost-effective choice when compared to an equivalent-sized alkaline battery. Nevertheless, you are still likely to pay more for a name brand such as Energizer, in order for the company to recoup their research and development costs.

2. Lithium cells may be a safety hazard, particularly when exposed to high temperatures for sustained periods of time. For this reason, the federal government has imposed transport restrictions on lithium batteries. Although these restrictions have recently been relaxed, lithium cells can and do explode because they contain a pressurized, flammable electrolyte. For this reason, it is advisable to store these cells in a temperature-stable environment.

3. Energizer currently has several different “versions” of their “Ultimate” Lithium batteries on the retail market. Some packages state “up to 4x longer” while newer versions announce on the front of the blister card up to 8x or 9x longer in selected devices. Be careful to select the latest available expiration date card(s) to avoid purchasing an earlier version of the product. Each cell also has a production/ lot code embossed on it; however, they are not at present, user-identifiable without assistance from Energizer.


1. These are excellent batteries when used properly and in the correct equipment. In consideration of the longer storage and discharge interval, my recommendation would be to use lithium cells for those appliances and equipment requiring longer replacement intervals such as fire, smoke and CO2 detectors; water sensors, outdoor sensors, digital cameras and remote controls to name just a few.

2. Avoid storing these cells in extreme temperatures-cool, dark and dry is recommended for maximum shelf life and safety. Avoid storing lithium cells in the refrigerator or freezer.

3. Energizer lithiums are, in my opinion, no better than those manufactured by other reputable companies. As such, price shop. If store (generic) lithiums are available, shop with your wallet. This is an excellent technology but you need to use and store them wisely.

These are outstanding batteries, if becoming hard to find in retail stores, because they last so long in continuous use, so unit sales are slow!

Far more economical than alkaline or "advanced" formula replaceable batteries

I use these "Ultimates" in a medical device (pump) because of their outstanding longevity, reliability, extreme power density, and superior power curve characteristics as compared to all other types of conventional disposable (AAA to D) batteries.

No more limping along with low battery alarms and limited (power-conserving) functionality for days, as with worn-out alkalines whose voltage slowly fades away along with the current. (Think of a dying flashlight with which you had to put up continuously for a couple of days!)

Full power (voltage) persists until just hours before collapse when used in low-but-constant-drain electronic applications. If these batteries have charge left, they act just like a new battery. When they are out of juice, they just stop, with just enough warning to grab a new battery. (Think of an engine running out of fuel.)

These are what conventional (non-specialty) batteries always should have been!

I have been replacing most of devices batteries for lithium ion ones as the time comes, and the extra cost is absolutely worth it. Beyond the practicality of the increased lifespan, the weight saving are especially beneficial for equipment I use for camping. i can feel confident that my batteries will not fail me, and to carry spares for the purpose of "just in case" adds very little additional weight to my gear.

Ok, I admit it. I am a battery snob. If it wasn’t Duracell, don’t even discuss it! All of my life I never liked any other brand. I tried them all and Duracell lasted longer until now…. I am a producer and create lots of interactive events that require wireless electronics that use batteries. I just did an event and had to order more than 80 batteries. And it was in very cold temperatures in NY. Cold temps reduce the battery life. That is why some people store them in the freezer to preserve them longer. We did a little test to see which batteries would last longer with a wireless broadcaster from Livestream. We used our favorite, Duracell in one unit, and then in an identical second unit we used the Energizer Ultimate. OMG! I felt like tweeting the world! The Duracell’s died after 2 hours, and the Energizer Ultimate’s lasted 5 hours! So I went on Amazon to see if I could find them at a better price than the drugstore, and lo and behold they were even less expensive than Walmart! So I quickly bought them and the event was a major success. I hate to say it, when it comes to these batteries go with the bunny instead of the copper top!

I used two of these "Energizer Ultimate AAA Lithium Batteries" in an outdoor temperature sensor. The batteries lasted 1 year and 4 months after being subjected to temperatures from 10 degrees below zero to as much as 130 degrees in the summer sun. These batteries are definitely worth it.

I bought the eight-pack in February, 2015. Four of them were installed in the Kwikset electronic deadbolt on my front door, and have been operating it for over eight months. I don’t know when I’m going to have to change them, they just keep on going. For reference, I was changing alkalines out in that unit every three to four weeks.

The gentleman who filed the one-star review because he thought the batteries should last 20 years apparently ignored both the packaging (which states that the 20 years is "shelf life", not "operating life"), and the "About the product" blurb on the Amazon product page that clearly states "Hold power for 20 years when not in use".

(this is the same review as the AA batteries i bought from the same seller, these are just AAA size)

this brand of lithium batteries might just be the best the average consumer can buy.

they do well in extreme temperatures, from freezing winters to boiling summers, these batteries are amazing.

i only use them in certain situations due to the cost, but they are the best batteries i have found.

I know you’re supposed to use these in devices that are quick-draining. I use this on my Ti-86 calculator, which obviously is not. They work great and last a very, very long time. The only problem is when I put 4 brand new ones into the calculator, the screen starts off totally dark. I would adjust the contrast to the lowest setting and that only gets it to the point where it is barely readable. I’m not sure why, but it seems these batteries give too much power (voltage?) to the calculator when they are brand new, ‘causing the contrast issue. My solution has been to swap out one of the new batteries with an older one. After a few weeks, when the batteries have somewhat drained, I’ll then swap out that old one with the new one. Very odd.

Energizers are, IMO, the best overall.
Have never had any leak and ruin what ever item they had been installed in. unlike another "major" band that did and destroyed a mini Maglite.
Would have done the same to a 4 D I have but caught them in time.
A Friend was not so lucky with one of his Maglites.

Only time will tell on claimed shelf life expectancy.

These batteries work great in high-drain devices and have a very long shelf life. I use them almost exclusively. For devices that slowly drain batteries over an extended period of time, they perform similarly to any good alkaline battery. Worth the money if you have critical equipment that puts large load demands on the cells. I try to avoid equipment that does not have rechargeable lithium-ion batteries, but some things just aren’t made that way.

These are also great if you are stockpiling supplies for disaster preparedness or accident readiness, especially because they maintain their charge even if left unused for a very long time.

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