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Energizer L91BP-4 AA Lithium Batteries (4-Pack) | 
| Brand: Energizer
List Price: $10.99
Buy New: $5.75
You Save: $5.24 (48%)
New (36) Used (1) from $5.75
Rating:  25 reviews
Sales Rank: 546
Color: BLUE
Media: Electronics
Autographed: No
Memorabilia: No
Number Of Items: 1
Batteries Included: No
Shipping Weight (lbs): 0.2
Dimensions (in): 4.5 x 3.8 x 0.8
Legal Disclaimer: Warranty does not cover misuse of product.
MPN: L91BP4
Model: L91
UPC: 039800017932
EAN: 0039800017932
ASIN: B00003IEME
Availability: Usually ships in 1-2 business days
Shipping: Expedited shipping available
Condition: In Factory Sealed Package. We are your Energizer Headquarters! Energizer # L91BP-4 APO/FPO Military and International Shipping welcome. Expedited Shipping is Federal Express, Express Saver Service.
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| Features:
| • | Power lasts up to 7-times longer than similar alkaline battery | | • | Battery chemistry and construction differ in the two systems. Energizer e2 Lithium batteries are built in a spirally wound construction. This design helps the battery meet the high current drains of many of today's devices | | • | Since lithium is a very active material, it provides a great deal of power relative to the amount of material used. Lithium is not considered a heavy metal | | • | When powering a device, you should only use a lithium battery with other lithium batteries - not compatible for use alongside an alkaline | | • | This battery is not rechargeable |
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| Editorial Reviews:
Product Description
All of Energizer e2 Lithium batteries' advantages combine to make them the World's Best AA batteries in high tech devices. First, they are the longest lasting AA batteries in high-tech devices, bar none. Second, both the Energizer e2 Lithium AA are 33 percent lighter than their alkaline counterparts. The increased portability afforded the user make them ideal for travel and situations where every ounce counts. Third, Energizer e2 Lithium batteries perform well in extreme temperatures, allowing digital cameras, flashes, CD players or MP3 players to work from the Arctic to the Sahara. Lastly, Energizer e2 Lithium batteries have a shelf life of up to 15 years vs. 7 years with ordinary alkaline, guaranteeing that they will perform when needed.
Amazon.com Product Description
The Energizer AA lithium battery lasts five times as long as alkaline batteries in digital cameras, three times as long as batteries in other cameras and flash applications, and weighs less than typical AA batteries. It performs in extreme temperatures, from -40 degrees to 140 degrees F. Pack of four.
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| Customer Reviews: Read 20 more reviews...
Match those batteries with the correct application for best results January 1, 2008
NLee the Engineer (Nashua, NH)
69 out of 69 found this review helpful
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.
More reliable than rechargables July 12, 2007
M. Molinaro (Philadelphia, PA USA)
17 out of 17 found this review helpful
I've found that rechargable batteries don't hold the charge very long--if my digital camera stays in my backpack with no shooting for several weeks, I can't depend on them. Regular alkaline batteries hold their charge but get used up quickly with a lot of heavy use like zooming, viewing pictures, etc. Li batteries seem to last months and months in terms of both holding their charge and surviving through heavy use. Also, I've read (don't know for sure) that Li batteries can function in wider extremes of temperature than alkaline.
Lightweight power source for your survival kit and special applications January 3, 2008
R. C Stoecklin (New York, NY United States)
17 out of 17 found this review helpful
These are "niche" batteries. They weigh half their Alkaline and NiMh brothers, store more energy, work in very low temperatures, and sit on the shelf for a decade without losing their charge.
As everyday consumables they make no sense (for that, look into Eneloop rechargeables). But as the cells that power your emergency flashlight, your GPS on the Inka Trail, or your radio during a blackout, they are a godsend.
Note that the voltage of these cells is slightly higher than regular AA's. Therefore, some devices actually *won't work*, at least not when the cells are fresh and fully charged! For example, people have posted problems with Garmin's Gpsmap 60csx or some regulated LED flashlights. I'd recommend you test your device with those cells before placing it in your survival kit or backpacking in Peru.
These batteries can improve your whole life. August 7, 2007
M. Krepela (Seattle)
16 out of 38 found this review helpful
Listen, you can buy just about any batteries and they will work, but how often does the simple act of inserting batteries into an appliance improve your entire life? Not often, people. These batteries are the answer to all of your problems.
For the uninitiated, let me explain: A 'battery' is a small device which contains sorcery. When you insert it into an electronic device, the sorcery stored inside taps into another dimension, and causes electronic fire-demons to inhabit your appliances and make them operate. Oh, ho! This is true. And yes any old 'battery' will accomplish this for you.
But, the Energizer L91BP-4 AA Lithium Batteries (4-Pack)are special. Not only do they summon the best demons, but they can counsel you on problems in your love life. Got a cheating spouse? Wondering if you can go the extra mile in bed? Listen to the sweet, intelligent voices of these little beauties and your problems are over.
Exactly as expected, and a good performer January 3, 2007
Matthew Mueller
14 out of 15 found this review helpful
These batteries went to feed a new camera battery grip I purchased at the same time. I've been shooting with the same four batteries for over 20 rolls now with a strong charge still present; they're very good performers and pretty long lasting that I see. Would recommend this brand to anyone interested in good, stable batteries.
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