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Technical Details
Size: AA | Unit Count: 4.0
- Provides high power per charge for power-hungry devices.
- Is ready when you are in devices you don't use as often, like flashlights and remote controls.
- Provides more power by being able to be charged up to 150 more times.
- Great for use in digital cameras, wireless gaming accessories, GPS equipment, and portable audio players.
Product Details
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Product Description
Size: AA | Unit Count: 4.0
Energizer Rechargeable batteries are great for use in your household devices, such as digital cameras, toys, remote controls, flashlights, and portable audio players. The Energizer Rechargeable AA battery continues to last 4x longer in digital cameras, hold its charge up to six full months, and now can be charged up to 150 more times
Customer Reviews
Most Helpful Customer Reviews
687 of 707 people found the following review helpful
Unit Count:4.0|Size Name:AA
All rechargeable battery manufacturers love to boast about their product's current capacity (mAh). But there is a dirty little secret that they don't want you to hear: self-discharge rate. Simply put: a fully charged NiCd or NiMH cell will gradually lose its stored energy over time. Technical papers I have researched typically put the self-discharge rate at 10-20% per month for NiCd cells, and 20-30% per month for NiMH cells. This kind of self-discharge rate is usually acceptable in applications such as digital cameras.
I bought 8 of those Energizer 2500mAh rechargeable NiMH batteries over one year ago. At first, I was very happy about the large current capacity offered by those batteries. But within a few months, I started to notice that they die very quickly in my digital camera. In fact, a set of Sony 2300mAh NiMH batteries I bought one year earlier seems to last much longer when used in the same camera.
I recently did some controlled experiments (using the LaCrosse BC-900 AlphaPower Battery Charger) and found out what's wrong: The Energizer NiMH batteries have very high self-discharge rate. After fully charging all 8 cells and left them on the shelf for one week, five of them lost over 30% of their charge, and the other three lost about 20%. In comparison, the set of older Sony batteries only lost around 10% over the same one-week period.
So what this really means is: if I charge up those Energizer 2500mAh batteries and leave them in my camera for three weeks, they will become totally exhausted. I found this kind of self-discharge rate completely unacceptable, therefore I strongly advise against buying those batteries.
[Update on April 9, 2007]
I have hardly used those Energizer 2500mAh cells in the last few month. Now they have deteriorated even further. Five of them can't even hold their charges for more then a day.
Instead of the Energizer 2500mAh cells, I recommend buying the Rayovac "Hybrid" 2100mAh cells. They have very low self-discharge rate (see my review on "RAYO 4PK AA") and are cheaper than the better-known Sanyo eneloop 2000mAh cells. Kodak also sells a "Pre-Charged" NiMH cell with exactly the same spec as the Rayovac Hybrid.
The bottom line: Low-Self-Discharge NiMH cells are your best choices. There is absolutely no point in taking chances with older generation 2500-2700mAh NiMH cells now.
[Update on Oct 20, 2010]
The product image of Energizer Rechargeable AA has changed. It no longer advertises '2500mAh'. I went to my local W*mart to check out the actual batteries. All Energizer rechargable AA cells are now 2300mAh. Evidentially, Energizer has 'rollled back' battery technology to 2004. This is actually a good move because the lower capacity cells do not suffer from hideous self-discharge rate. Contrary to popular belief, a 2300mAh cell is not any less capable in delivering high power than a 2500mAh cell. Just that the run time will be about 8% shorter.
I bought 8 of those Energizer 2500mAh rechargeable NiMH batteries over one year ago. At first, I was very happy about the large current capacity offered by those batteries. But within a few months, I started to notice that they die very quickly in my digital camera. In fact, a set of Sony 2300mAh NiMH batteries I bought one year earlier seems to last much longer when used in the same camera.
I recently did some controlled experiments (using the LaCrosse BC-900 AlphaPower Battery Charger) and found out what's wrong: The Energizer NiMH batteries have very high self-discharge rate. After fully charging all 8 cells and left them on the shelf for one week, five of them lost over 30% of their charge, and the other three lost about 20%. In comparison, the set of older Sony batteries only lost around 10% over the same one-week period.
So what this really means is: if I charge up those Energizer 2500mAh batteries and leave them in my camera for three weeks, they will become totally exhausted. I found this kind of self-discharge rate completely unacceptable, therefore I strongly advise against buying those batteries.
[Update on April 9, 2007]
I have hardly used those Energizer 2500mAh cells in the last few month. Now they have deteriorated even further. Five of them can't even hold their charges for more then a day.
Instead of the Energizer 2500mAh cells, I recommend buying the Rayovac "Hybrid" 2100mAh cells. They have very low self-discharge rate (see my review on "RAYO 4PK AA") and are cheaper than the better-known Sanyo eneloop 2000mAh cells. Kodak also sells a "Pre-Charged" NiMH cell with exactly the same spec as the Rayovac Hybrid.
The bottom line: Low-Self-Discharge NiMH cells are your best choices. There is absolutely no point in taking chances with older generation 2500-2700mAh NiMH cells now.
[Update on Oct 20, 2010]
The product image of Energizer Rechargeable AA has changed. It no longer advertises '2500mAh'. I went to my local W*mart to check out the actual batteries. All Energizer rechargable AA cells are now 2300mAh. Evidentially, Energizer has 'rollled back' battery technology to 2004. This is actually a good move because the lower capacity cells do not suffer from hideous self-discharge rate. Contrary to popular belief, a 2300mAh cell is not any less capable in delivering high power than a 2500mAh cell. Just that the run time will be about 8% shorter.
49 of 51 people found the following review helpful
Unit Count:4.0|Size Name:AA
I've been using NIMH batteries from SANYO, NEXCELL, POWEREX and AccuPower for over 6 years. Use them for everything from high current drain digital cameras and high-end digital audio recorders to CD players, bathroom scales and flashlights.
I rely on two of the excellent MAHA MH-C401FSB smart 2-rate chargers. These charge and monitor each battery independently, not in pairs. Energizer 2500 mAH units were fine for about three months. Then I noticed that devices would be calling for new batteries with little to no use. This has never happened with other AAs NIMH, including those with less than half the advertised capacity. The MAHA charger also started reporting that some of the Energizer AAs were not taking a charge at all.
Kept finding that typically one out of four were the problem. Many of the 32 AA Energizers I bought have had problems. Repeatedly have had one battery run out of charge while others still test very strong. Felt pen dots put on discharged batteries showed it was the same batteries time and time again. Have reverted in some cases to 1600 mAH SANYO OEM batteries put in service in Feb 2001 and those provide longer and more reliable performance!
In my considerable experience with these 2500 mAH AA Energizers they have been a very big disappointment and, regardless of warranty, cannot be relied upon.
I rely on two of the excellent MAHA MH-C401FSB smart 2-rate chargers. These charge and monitor each battery independently, not in pairs. Energizer 2500 mAH units were fine for about three months. Then I noticed that devices would be calling for new batteries with little to no use. This has never happened with other AAs NIMH, including those with less than half the advertised capacity. The MAHA charger also started reporting that some of the Energizer AAs were not taking a charge at all.
Kept finding that typically one out of four were the problem. Many of the 32 AA Energizers I bought have had problems. Repeatedly have had one battery run out of charge while others still test very strong. Felt pen dots put on discharged batteries showed it was the same batteries time and time again. Have reverted in some cases to 1600 mAH SANYO OEM batteries put in service in Feb 2001 and those provide longer and more reliable performance!
In my considerable experience with these 2500 mAH AA Energizers they have been a very big disappointment and, regardless of warranty, cannot be relied upon.
151 of 176 people found the following review helpful
Unit Count:4.0| Size Name:AA|Amazon Verified Purchase
I bought a bunch of Energizer's AA ACCU NiMH rechargeable batteries to power a halogen bicycle light and LEGO Mindstorms robots. Their performance has exceeded my expectations.
The bicycle light seems as bright as it ever was with alkaline batteries, affording good visibility during night time cycling. And stopping play---er, experimentation---with the LEGO robots for recharging has yet to be a problem.
However, I do have to issue this warning: these batteries are slightly fatter than standard AA batteries. I tried using them in a Mini Mag Light. After I got one battery in the light's barrel, I realized---too late---that I'd never get the batteries back out. I ended up destroying the Mini Mag Light in order to retrieve the batteries.
If your application is cramped for space, beware! If they do fit, expect good energy for a good long time.
Most Recent Customer Reviews
Doesn't hold a charge
The batteries worked well for maybe a month. After that, they only held a charge long enough to power my bluetooth mouse for about a week. Read more
Published 9 days ago by JL
The batteries do not hold a charge
I bought this product so I would not have to constantly buy new batteries for my mouse and keyboard. Read more
Published 16 days ago by GREENMAN
Old technology, never really performed
I had high hopes, but my wife complains about them all the time. She wants to toss the camera, but I now switched to newer technology batteries and it works now. Read more
Published 20 days ago by D. Korte
Put me off using rechargeable batteries forever
I spent over $50 to try and be eco-friendly and bought the AAA and AA rechargeable batteries with the recharger. Read more
Published 1 month ago by Tim Rose
Die after 2 recharges
Even after using a trickle charger, these keep dying left and right and will not charge any further. Will be looking for different brand of rechargeables.
Published 1 month ago by Deafmetal
Saves Money, Performs As Advertised
I was initially skeptical about the quality and duration of rechargeable batteries but no longer. I purchased 2 chargers which came with 2AA energizer rechargeable batteries. Read more
Published 1 month ago by Big Red
Good For People that Use a lot of Batteries
These Energizer Rechargeable batteries are very good for people that use items which are generally considered to be battery hogs. Read more
Published 2 months ago by R. Toro
Poor
I bought this item expecting not to have to buy a ton more batteries for my sons LeapPad. This was not the case after two charges of these batteries two of the batteries stopped... Read more
Published 2 months ago by Matt
NH Rechargeable AA for Hand Controllers Xbox 360
Good quality batteries to use for The Xbox 360 hand controllers. Don't hesitate to purchase these. Read more
Published 2 months ago by Dr
Junk
These batteries just don't hold a charge very long at all. Won't buy again. Going with Sanyo batteries from now on.
Published 2 months ago by Paul D. Ladendorf
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Important Information
Indications
Features of Energizer Rechargeable AA Batteries, Model: NH15BP 4 Hard working reusable power. 2500mAh. Energizer rechargeable provide long life
Features of Energizer Rechargeable AA Batteries, Model: NH15BP 4 Hard working reusable power. 2500mAh. Energizer rechargeable provide long life
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Size: AA | Unit Count: 4.0
