Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
- 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
- 17 year storage life
- This item is not for sale in Catalina Island
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.
Rating: 
(out of 30 reviews)
List Price: $ 19.99
Price: $ 10.55
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September 3rd, 2010 at 4:13 pm
Review by NLee the Engineer for Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
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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.
September 3rd, 2010 at 4:44 pm
Review by Rebecca Hatfield for Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
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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.
September 3rd, 2010 at 4:56 pm
Review by Bruce E. Bowe for Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
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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..
September 3rd, 2010 at 5:10 pm
Review by Stephen for Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
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The Energizer Lithium AA battery 8-packs are great value. I discovered these batteries as they came with my Apple wireless keyboard and mouse. I was incredibly impressed by the longevity of those particular wireless devices, when powered by these lithium batteries. I went several months without thinking about batteries in them. By comparison, afterwards, I used traditional alkaline AAs and the same devices lasted only a few short weeks.
Now I am again enjoying the benefits of these lithium batteries. This 8-pack sold on Amazon is a particularly great value. At first I thought the lithium batteries were too expensive, when I saw a 2-pack in a store, for nearly ten dollars. With this package on Amazon, the batteries usually cost around two dollars each. A great value and not much more than alkaline batteries, for a lot longer lasting power!
Lithium batteries also work better in extreme temperatures. If you, for example, have an outside thermostat for a weather station, this will work in the winter, whereas an alkaline battery may not.
An interesting tip, when my higher power devices, like bluetooth keyboard, runs low on power. I go ahead and pop one of the used lithium batteries into a clock. I’m not sure how long it will last, but it’s a great way to recycle at least a few of your almost drained lithium batteries.
Now I’ve started using these, new, in powered toothbrushes, and I find it’s a lot more powerful and longer lasting.
I highly recommended these for devices that quickly drain regular alkaline varieties.
September 3rd, 2010 at 5:45 pm
Review by R. Dilgard for Energizer L91BP-8 Lithium AA Photo Battery (8-Pack)
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In May of 2009 I was shooting pictures for my flower club, all with the built in flash of my digital SLR. Half way through, 3 sets of regular Ni-HM rechargables were dead. Ran to the nearest store and grabbed a set of these. Stuck 4 in the camera and finished shooting. Its now January 2010, I have shot 100’s of pictures on these same 4 batteries and the camera still shows full charge.
I generally shoot club or church events with this camera so it may sit for a month or two and then I shoot 100 pictures or more for some event. I don’t have to think about charging any batteries ahead of time, these are in the camera along with spares in the bag. Yes they seem expensive, but to have batteries last this long and always ready to shoot is worth every dime.