Energizer L91BP-8 Ultimate Lithium AA Batteries (8-Pack)
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- Perform in extreme temperatures from -40°F to 140°F
- Hold power for 20 years when not in use.
- Leak resistant construction.
- Weigh 1/3 less than standard alkaline batteries
- Last up to 9x longer in digital cameras (versus Energizer MAX. results vary by camera.), which means 9x less waste
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Energizer Ultimate Lithium batteries raise the bar on long-lasting power for today’s modern electronics. Earning the title “the world’s longest-lasting AA batteries in high-tech devices”, Ultimate Lithium helps ensure uninterrupted gaming, music, home safety systems and critical work tasks. With its ability to perform in extreme temperatures and last in storage for up to 20 years, Ultimate Lithium is the clear choice to dependably power the essential devices in your life.
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Top Customer Reviews
Nonrechargeable (called 'primary') lithium iron disulfide (Li-FeS2) cells like this have three advantages over 'regular' 1.5-volt alkaline or heavy-duty zinc-carbon dry cells:
1. Much higher energy capacity. How much depends mostly on the amount of power draw from the device.
2. Much longer shelf life -- cells are now marked 'best before' 15 years from date of manufacture!
3. Much lighter weight -- useful when backpacking and many other applications.
4. More power output in cold conditions.
5. Much less likely to leak and corrode devices from the inside.
The main disadvantage is cost. Additionally, a few devices don't understand the discharge curve of the lithium cells and prematurely indicate full discharge of these batteries. If you want to measure the capacity of these or any other rechargeable or nonrechargeable batteries or cells, I highly recommend the expensive but very well built The ZTS Multi-Battery Tester With Case - MBT-1.
A somewhat cheaper option, if you don't need the highest possible capacity/runtime but do want the other advantages, are Energizer Advanced Lithium Batteries, AA Size, 8-Count.
The other device I always use lithium batteries on is my outdoor weather station. Our Minnesota winters can see air temperatures at -30F or sometimes colder. There is no other battery that will work at that temperature, period. Although that is even on the cold side for a lithium battery, they still had no issues keeping up all winter. That devices also transmits a signal to the indoor base station every 7 seconds. Anything that transmits uses more power than a device on standby mode and this yet another area where lithium batteries excel in performance. If I used alkaline batteries on my weather station, I could bet on changing the batteries out every 6 months. With these lithium batteries, I can get 18 months without issue and never have to worry about them failing when it gets cold out.
Sure, these cost more money than alkaline batteries and significantly more than the "heavy duty" batteries, but you'll not find a mower powerful and longer lasting AA battery on the market, period. You get what you pay for and you'll love these Engergizers!
Most Recent Customer Reviews
Three batteries still show 1.4 v, Three show 1.Read more
Used for outside weather station and coped admirably with the cold Michigan winter weather and still going strong.Read more