Energizer Ultimate L92BP-4 Lithium AAA Battery 4 Pack

by Energizer

Product Details

• Product Dimensions: 0.5 x 3.8 x 4.5 inches ; 0.3 ounces
• Shipping Weight: 0.8 ounces (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B0002DUQDQ
• Item model number: L92BP4
• Batteries: 4 Lithium Metal batteries required.
• Average Customer Review: 4.5 out of 5 stars  See all reviews (196 customer reviews)
• Amazon Best Sellers Rank:
  • #15 in Electronics > Accessories & Supplies > Batteries, Chargers & Accessories > Household Batteries > AAA
  • #25 in Electronics > Accessories & Supplies > Batteries, Chargers & Accessories > Household Batteries > AA
• Date first available at Amazon.com: June 29, 2004

Product Description

Size: AAA | Unit Count: 4.0

Amazon.com Product Description

Energizer Ultimate Lithium Batteries

Energizer Ultimate Lithium batteries offer the longest lasting power for your high-tech devices. This dependable, light-weight battery offers the latest lithium battery technology that's proven to be the world's longest lasting AA and AAA batteries in high-tech devices.

Made from the lightest metal known, Energizer Ultimate Lithium differs from traditional alkaline batteries in its construction and chemistry. It is this unique composition that is able to meet the needs of today's high-draining devices and provide the longest lasting power available. Energizer Ultimate Lithium batteries also produce up to 8X less waste in digital cameras than traditional alkaline batteries.

Energizer Ultimate Lithium is the product that powers the devices that make your life easier and more fun. Digital cameras to capture memories, a handheld GPS device to find your way, and everything in between.

Performs in extreme temperatures from -40° F to 140° F: Great for outdoor use Leak resistant construction: Assurance for expensive electronics Weigh 1/3 less than ordinary alkaline AA and AAA batteries: Ideal for traveling and portability Up to 15 years shelf life: AA and AAA cells	Available in multiple cell sizes to power all your high-draining devices. Energizer Ultimate Lithium AA Lasts up to 8X longer* in digital cameras Lasts up to 7 hours longer** in handheld GPS devices Lasts up to 3.5 hours longer** in CD Players Lasts up to 2X longer*** in photo flashes *vs. Energizer MAX. Results vary by camera. **vs. Energizer MAX. AA only. Results vary by device. ***vs. leading ordinary alkaline. AA only. Results vary by device. ___________________ Energizer Ultimate Lithium AAA Lasts up to 8X longer* in digital cameras Lasts up to 6 hours longer** in handheld GPS devices Lasts up to 5.5 hours longer*** in MP3 Players *vs. Energizer MAX. Results vary by camera. **vs Energizer MAX. AAA only. Results vary by device. ***vs. Energizer MAX based on proposed industry standard tests. AAA only. ___________________
Reusable Power High Tech Everyday Life Energizer Recharge: 2300 mAh holds charge longer* AA comes precharged for immediate use *vs. Energizer AA 2450 mAh based on 12 month charge retention Ideal for use in your household devices, such as digital cameras, toys, remote controls, flashlights, and portable audio players Available Cell Sizes: AA AAA C D 9V Energizer Advanced Lithium: Lasts 30% longer* in handheld games, AA only Lasts up to 4X longer* in digital cameras Up to 10 years shelf life *vs. Energizer Max. Results vary by device Ideal for use in digital cameras, handheld GPS devices, photo flashes and video-game accessories Available Cell Sizes: AA AAA 9V Energizer Ultimate Lithium: Lasts up to 8X longer* in digital cameras Performs in extreme temperatures from -40 degrees F to 140 degrees F Up to 15 years shelf life * vs. Energizer Max. Results vary by camera Ideal for use in digital cameras, handheld GPS devices, photo flashes and video-game accessories Available Cell Sizes: AA AAA Energizer Max: Makers of the World's 1st* Zero Mercury alkaline battery Up to 7 years of shelf life for AA, AAA, C, and D and up to 5 years of shelf life for 9V *Commercially available since 1991 Ideal for the devices you use every day--from toys to video game controllers to flashlights Available Cell Sizes: AA AAA C D 9V

(C) 2011 Energizer. Energizer, Energizer Bunny design, card and label graphics and shape, and other marks are trademarks of Energizer.

Product Description

Energizer Ultimate Lithium batteries deliver long-lasting power to keep up with today's high-tech, power hungry devices like digital cameras, photo flash units and handheld GPS devices.

Customer Reviews

Most Helpful Customer Reviews

335 of 340 people found the following review helpful:

5.0 out of 5 stars Match those batteries with the correct application for best results, January 1, 2008

By 

NLee the Engineer (Nashua, NH) - See all my reviews
(HALL OF FAME REVIEWER)    (TOP 10 REVIEWER)   

This review is from: Energizer Ultimate L91BP-4 Lithium AA Batteries, Pack of 4 (Electronics)

The Energizer L91 Lithium AA cell is a fantastic power source. For high-drain applications, it offers great advantages over ordinary alkaline cell and rechargeable NiMH cell. However, it is also very expensive as a disposable battery. So it is important to recognize the strength of L91, and use it only in applications that give you the best results. Otherwise you'll be wasting your money.

According to data sheet published by Energizer, the capacity of the Lithium AA cell (L91) is 3000mAh. This number remains nearly constant with load current. In comparison, the ordinary Alkaline battery (such as the Energizer E91 AA) is rated as 2800mAh, but only at a very light load of 25mA. At a heavy load of 1000mA (typical for a digital camera or flash unit), its capacity drops to below 1000mAh. This number gets even worse at low temperature. At zero degree C and 1000mA load, the L91 can provide about seven times more energy compared to the E91. This is where the marketing claim of "Last up to 7 times longer" comes from.

When used in a digital camera at room temperature of 25 degree C, the L91 is more likely to last 3-4 times longer than alkaline. This is enough to justify its price, which is also around 3-4 times higher than alkaline. However, in low-drain applications (such as smoke detector, wireless mouse or remote control) alkaline cells will last just as long at a fraction of the cost.

The L91 also contains much higher energy when compared to an ordinary rechargeable NiMH cell such as the Energizer NH15-2500. This is partially due to its higher terminal voltage of 1.5V, which is 20% higher than that for NiMH.
Energy stored in NH15-2500 : 2.5Ah * 1.25V = 3.125Wh,
Energy stored in L91 : 3Ah * 1.5V = 4.5Wh (44% higher).

Higher terminal voltage for L91 is especially advantageous in digital camera applications, because your camera flash will recharge up to 20% faster. An added benefit is that the L91 weighs only 14.5 grams (0.5 oz) each, compared to 30 grams (1 oz) for NiMH. So your camera becomes much lighter.

The NH15-2500, like all ordinary NiMH cells, suffers from rapid self-discharge problem. If you charge up a set of those cells and leave them in your camera for a few weeks, you're likely to be greeted by 'Low Battery' sign when you try to take a photo. The new generation of 'ready-to-use' NiMH cells such as SANYO eneloop and Rayovac Hybrid solved this problem by having very low self discharge rate. But they have lower capacity of only 2000-2100mAh.

Bottom line: If you need AA batteries for a long hiking trip, then L91 is obviously your best choice. For most other situations, I recommend using low self-discharge NiMH cells for lower operating cost.

135 of 141 people found the following review helpful:

5.0 out of 5 stars Lithium AA batteries are NOT the same as Lithium-ion Rechargeable, January 1, 2008

By 

NLee the Engineer (Nashua, NH) - See all my reviews
(HALL OF FAME REVIEWER)    (TOP 10 REVIEWER)   

This review is from: Energizer L91BP-8 Lithium AA Photo Battery (8-Pack) (Electronics)

[Updated on June 8, 2011]
Note: Amazon has moved two of my previous reviews (one for Energizer Lithium AA 4-pack, one for 8-pack) under one page. Therefore I have to update my review to add some new information - or else I look like a fool who says the same thing twice.

=== New information follows ===

There seems to be some confusion about those Energizer Lithium AA batteries. Several people have bought those batteries under the assumption that they are rechargeable, only to be disappointed later.

Despite the name 'Lithium', those Energizer Lithium AA batteries are very different from the commonly known 'Lithium-ion' rechargeable batteries. Namely:

- They are single-use batteries (NOT rechargeable like Li-ion)
- The terminal voltage for each cell is around 1.65V (compared to around 3.7V for each Li-ion rechargeable cell)

The two types of batteries are not compatible. If your camera accepts AA cells, then you should use those Lithium AA cells and not Li-ion rechargeable battery. Alternatively, you may explore other rechargeable battery options, namely:

1. Low-self-discharge NiMH AA cells, such as Sanyo Eneloop or Sony Cycle Pre-Charged. Those have a operating voltage of 1.25V per cell, so some cameras (especially those that use only two cells) may not operate correctly on those.

2. Nickel-Zinc rechargeable such as PowerGenix AA. Those have higher terminal voltage of 1.65V, same as that of Lithium AA cells. The down-side is that the higher voltage may cause some older cameras to burn out, and the NiZn cells themselves have very poor lifespan.

No matter which rechargeable option you pick, remember that they each need their own special charger. Choosing a good charger is the key to longer lifespan for rechargeable batteries.

I recommend most people to try eneloop cells first. They are the most reliable among NiMH batteries. If it doesn't work well for your camera, you can still use those celll in other appliances such as flashlights or Wii remotes.

Finally, it is a good idea to keep a set of those Lithium AA cells as backup, or in case or emergency. They can be kept in storage for ~10 years!

73 of 75 people found the following review helpful:

4.0 out of 5 stars Match those batteries with the correct application for best result, July 21, 2008

By 

NLee the Engineer (Nashua, NH) - See all my reviews
(HALL OF FAME REVIEWER)    (TOP 10 REVIEWER)   

This review is from: Energizer Ultimate L92BP-4 Lithium AAA Battery 4 Pack (Electronics)

The Energizer L92 Lithium AAA cell is a fantastic power source. For high-drain applications, it offers great advantages over ordinary alkaline cell and rechargeable NiMH cell. However, it is also very expensive as a disposable battery. So it is important to recognize the strength of L92, and use it only in applications that give you the best results. Otherwise you'll be wasting your money.

According to data sheet published by Energizer, the capacity of this Lithium AAA cell (L92) is 1200mAh. This number remains nearly constant with load current. In comparison, the ordinary Alkaline battery (such as the Energizer E92) is also rated as 1200mAh, but only at a very light load of 25mA. At a heavy load of 500mA (typical for a P&S digital camera), its capacity is reduced to about one-third. The difference gets even greater at low temperature. At zero degree C and 500mA load, the L92 can provide about seven times more energy compared to the E92. This is where the marketing claim of "Last up to 7 times longer" comes from.

When used in a digital camera at room temperature of 25 degree C, the L92 is more likely to last 3-4 times longer than alkaline. This is enough to justify its price, which is also around 3-4 times higher than alkaline. However, in low-drain applications (such as smoke detector, wireless mouse or remote control) alkaline cells will last just as long at a fraction of the cost.

The L92 also contains much higher energy when compared to rechargeable NiMH cell such as the Sanyo Eneloop AAA. This is partially due to its higher terminal voltage of 1.5V, which is 20% higher than that for NiMH.
Energy stored in eneloop AAA: 0.8Ah * 1.25V = 1.0Wh,
Energy stored in L92 : 1.2Ah * 1.5V = 1.8Wh (80% higher).

Higher terminal voltage for L92 is especially advantageous in digital camera applications, because your camera flash will recharge up to 20% faster. On the other hand, it may create problems with some applications such as unregulated LED flash light. Higher than expected voltage will make the lamp burn brighter, but the excessive heat may also cause the lamp to burn out quickly.

Bottom line: If you need AAA batteries for a long hiking trip or for emergency standby, then L92 is obviously your best choice. For most other situations, I recommend using low self-discharge NiMH cells for lower operating cost.

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