Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)

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Product Details

• Product Dimensions: 4.5 x 3.7 x 1.2 inches ; 5.3 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• Note: Gift-wrapping is not available for this item.
• ASIN: B0000DC4EL
• Item model number: L91BP-8
• Average Customer Review: 4.8 out of 5 stars  See all reviews (16 customer reviews)
• Amazon.com Sales Rank

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  #10 in	Electronics > Accessories & Supplies > Batteries, Chargers & Accessories > Household Batteries > AA
  #10 in	Health & Personal Care > Household Supplies > Household Batteries > AA

• Date first available at Amazon.com: December 9, 2004

Product Description

Product Description

These powerful AA lithium batteries work in any devices requiring AA batteries, but perform especially well in high-drain devices like digital cameras and MP3 players. They last up to 7 times longer than ordinary alkaline batteries in digital cameras.Perfect for use in digital cameras, these Energizer E2 Lithium AA batteries weigh less and provide superior performance compared to ordinary alkaline batteries. Great for digital devices requiring advanced power, including digital cameras, CD players, PDAs and more.Designed especially for use in photography devices, calculators, memory backup, pocket pagers, and watches, Energizer Lithium Photo batteries offer a longer lasting power source for devices typically powered by alkaline batteries.

Customer Reviews

Most Helpful Customer Reviews

36 of 39 people found the following review helpful:

5.0 out of 5 stars Long-lasting, November 22, 2003

By	Rebecca Hatfield (Missouri) - See all my reviews

As a student who is very involved in clubs and organizations, I always want to have my digital camera at hand to capture unforgettable moments with my friends or the places that I visit.

When it comes to cameras, digital cameras are the worst with battery power. When I first got my camera, the pair of double A batteries that came with it only lasted an hour. I then bought a brand new pack later, and those also were unusable within 60 minutes.

This was going to be a major problem. I bought a pack of special Olympus Lithium batteries (very expensive and hard to find at the time) which lasted, at max, two and a half weeks.

Finally, I found a pack of Energizer Lithium batteries. I stuck them in my camera and expected them to last about five days. To my surprise, this pack of four batteries lasted me a whole month of road trips and hang-outs.

These batteries are long-lasting, reliable, very light, and inexpensive. I was very satisfied with the performance of these batteries, and I hope this review helped you in your decision or search.

21 of 23 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 (TOP 50 REVIEWER)

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.

5 of 5 people found the following review helpful:

5.0 out of 5 stars Whole new world, September 13, 2005

By	Bruce E. Bowe "Bruce B" (Santa Rosa, CA USA) - See all my reviews (REAL NAME)

Wow! I'm probably going to change the way I look at batteries from now on. We stuck two of these in our Sony digital camera and put two more in the bag to use when these ran out, and went on vacation for two weeks. I'm not sure how many photos we took in two weeks, but after culling out maybe 50 that we didn't want, we wind up with 206. Many of these were taken using the flash. During the trip, I downloaded the pics to my laptop about 3 times directly from the camera, and that also takes a bunch of power. Since the trip, there was a social occasion where my wife took perhaps 20 pictures since she got conned into being the staff photographer.
After all that, the camera shows the battery as fully charged!!
We're about to go on a 18 day trip to So. America and what I'm going to do is to take the camera with the used batteries still in it, and take a spare pair. I WAS figuring on having to take my charger with an adapter plug which would have been just one more thing to lug to Peru. Not now.
I just ordered some more for the future. I doubt if I'll ever use rechargables again.
Yes, these are expensive. In my humble opinion, the cost is WAY outweighed by the convenience..