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Energizer Ultimate L91BP-4 Lithium AA Battery 4 Pack |  | Brand: Energizer
Category: CE
Department: Batteries
List Price: $11.99
Buy New: $2.25
as of 9/5/2010 01:22 CDT details
You Save: $9.74 (81%)
New (75) from $2.25
Seller: Gms Market
Rating:  56 reviews
Color: BLUE
Media: Electronics
Autographed: No
Memorabilia: No
Number Of Items: 1
Batteries Included: No
Battery Type: Lithium Ion
Battery: AA type
Shipping Weight (lbs): 0.2
Dimensions (in): 0.6 x 3.8 x 4.5
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
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| Features:
| • | Last up to 8x longer in digital cameras (versus Energizer MAX. results vary by camera.) | | • | Weigh 1/3 less than standard alkaline batteries | | • | Perform in extreme temperatures from -40degree F to 140degree F | | • | 16 year storage life | | • | This item is not for sale in Catalina Island |
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Product Description
Energizer e2 Lithium batteries deliver long-lasting power to keep up with today's high-tech, power hungry devices like digital and photo flash cameras, MP3 and portable CD players, and hand-held games. Energizer e2 AA's in convenient 4 pack.
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:
Showing reviews 1-5 of 56
Match those batteries with the correct application for best results January 1, 2008
NLee the Engineer (Nashua, NH)
140 out of 142 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.
Lightweight power source for your survival kit and special applications January 3, 2008
Ray Stoecklin (New York, NY United States)
31 out of 33 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 check with the manufacturer and test your device with those cells before placing them in your survival kit.
More reliable than rechargables July 12, 2007
M. Molinaro (Philadelphia, PA USA)
27 out of 30 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.
Exactly as expected, and a good performer January 3, 2007
Matthew Mueller
16 out of 17 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.
These are manditory in the winter February 12, 2006
Justin V
12 out of 12 found this review helpful
These batteries are expensive but they blow away the performance of alkaline batteries. I do a lot of backpacking and winter mountaineering and I use these a lot in my GPS and flashlight. AA lithium batteries are lighter and weight about as much as a AAA alkaline battery. These last several times longer in all conditions than alkaline batteries. Cold weather is where these really shine. These work to -40 degrees. Alkaline are terrible below freezing. If I am night hiking in the winter conventional batteries only last an hour or two in a flashlight. These will last all night long. Many cameras probably won't even work in the winter with alkaline batteries.
If you leave a flashlight in your car, buy a LED AA flashlight and put these batteries in it. It will actually work when you need it even in winter.
The only downside to these other than price is they produce a brief voltage spike when you turn something on. This should not be a problem in most electronic devices because they have voltage regulators. I find they are hard on bulbs in incandesant flashlights. I always brought 2 spare bulbs because I blew them frequently (tutning the light off and on frequently made this worse). I've never heard of a problem with these in LED flashlights.
Showing reviews 1-5 of 56
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