Rechargeable Up To 1500X; Low Self Discharge-Batteries Maintain 75% Charge After 3 Years Of Non-Use; Pre Charged & Ready To Use; 2000 Mah; No Memory Effect; Aa; 4 Pk

• Recharge up to 1500 times


• Low Self Discharge: Batteries maintain 75% charge after 3 years of non-use


• Pre charged and ready to use


• 2000 mAH power


• No memory effect

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The new SEC-MQN064N 4-AA eneloop with AC charger pack utilizes SANYO's advanced rechargeable battery technology allowing them to last longer than ever before! They provide excellent performance-to-cost advantages over both conventional alkaline and other rechargeable batteries. Unlike disposable batteries which can only be used only once and are wasteful to the environment the new eneloop batteries can be recharged up to 1500 times. They also maintain 75% of their charge up to 3 years when not in use. The come pre-charged and can be used immediately out of the pack eneloop batteries deliver reliable battery performance when you need it the most!

• Recharge up to 1500 times


• AC charger designed for 2 or 4 AA or AAA batteries


• Low Self Discharge: Batteries maintain 75% charge after 3 years of non-use


• 2000 mAH power -AA batteries; 800 mAH power-AAA batteries


• No memory effect

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BYD 8 Pack AAA NiMH Pre-Charged Rechargeable Batteries Product Features 8-pack 2000 mAh rechargeable AA batteries for digital cameras remotes and more. Pre-charged and ready to use right out of the pack;Extremely slow self-discharge rate maintains 80% of capacity after 1 year of storage at 20℃. Greater Power and Better Performance in lower temp than Alkaline.Combines best features of AA alkaline (ready to use) and rechargeable (reusable) batteries Can be charged up to 1000 times (including partially) without experiencing memory effect[]

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• Ships in Certified Frustration-Free Packaging


• Store your batteries in the easy-to-open package.


• Is free from mercury


• Guaranteed Fresh for 7 Years

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The new SEC-HR3U8BPN 8-AA eneloop battery pack utilizes SANYO's advanced rechargeable battery technology allowing them to last longer than ever before! They provide excellent performance-to-cost advantages over both conventional alkaline and other rechargeable batteries. Unlike disposable batteries which can only be used only once and are wasteful to the environment the new eneloop batteries can be recharged up to 1500 times. They come pre-charged can be used immediately out of the pack and maintain 75% of their charge for up to 3 years when not in use. Eneloop batteries deliver reliable battery performance when you need it the most!

• Recharge up to 1500 times


• Low Self Discharge: Batteries maintain 75% charge after 3 years of non-use


• Pre charged and ready to use


• 2000 mAH power


• No memory effect

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New improved eneloop kit in colors

eneloop - ready to use rechargeable battery. Since its launch in November 2005 eneloop has become well-known around the world as it has revolutionized the consumer-use rechargeable battery segment with its unique features:

* rechargeable approximately 1000 times
* coming pre-charged making it usable immediately after purchase
* its unique design departing from the look of traditional batteries

What is the difference between the "old" and the "new" improved eneloop?

* An extra of 500 charging cycles - instead of being rechargeable 1000 times the new eneloop is even rechargeable up to 1500 times.
* Improved self-dischcharge. Even though the self discharge of the old eneloop was already very impressive you can store the new eneloop for 3 years and still it will retain 75% of its capacity.
* You need a battery which is reliable even when having cold temperatures? Before eneloop was suitable for temperatures as low as -10°C - now even until -20°C.
* The new eneloop is even more environment-friendly as it is pre-charged with solar energy in Japan.

• Holds charge up to 3 years. Each eneloop will maintain 75% capacity after 3 years of non-use.


• Recharge 1500x. New and Improved! Each eneloop can be recharged 1500 times.


• Pre-charged and ready to use in your favorite devices


• Less than 4 cents per recharge. Save money. Over thier lifetime each eneloop costs less then 4 cents per recharge.


• INCLUDES: (8) AA eneloop (4) AAA eneloop and (1) 4 battery charger

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Designed for today's high-drain digital devices Sony 2500mAh rechargeable batteries last up to five times longer than standard alkaline batteries. These economical environmentally-friendly Nickel-Metal Hydride (NiMH) batteries can be recharged up to 300 times.

• Ideal for digital products


• High capacity -- lasts 3 times longer than alkaline


• Designed for use with Sony’s advanced power charge

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Manufactured to the highest standards in the industry Maxell's alkaline batteries provide unrivaled value. You can depend on these batteries to power your emergency flashlight your children's toys or even your smoke alarm. Maxell batteries provide long-lasting reliable power.

• 48 AA alkaline batteries


• Ready-to-go power source


• Delivers long-lasting and reliable power


• Compatible with a variety of products including flashlights toys remote controls and smoke alarms

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Manufactured specifically for professional and industrial applications these batteries are among the most dependable long lasting alkaline power cells available. Value priced bulk quantities equate to substantial savings. Secure seal corrosion resistance protects valuable sensitive equipment. Please note - Duracell Procell is an industrial use battery that is used for one use type machinery.

• For professional and industrial applications


• These batteries are among the most dependable


• Long lasting

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Duracell Pre-Charged Rechargeable NiMH AA Batteries (4-Pack) are ideal for high-drain items such as digital cameras gaming devices and portable audio products

• Duracell Pre-Charged batteries are charged and ready for use right out of the package


• Duracell Pre-Charged batteries retain power for up to 365 days while not in use


• Can be recharged and reused hundreds of times


• Stays charged longer than RCR and have to be recharged less often


• Contains 4 AA pre-charged rechargeable batteries

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Duracell is the World's No. 1 Brand - performance guaranteed! Duracell Coppertop delivers long-lasting efficient and reliable power in popular battery powered devices such as: toys Wii remotes portable gaming systems smoke alarms clocks and radios.

• Duracell is the World's No. 1 Brand - Based on Nielsen Worldwide sales data 2007-2008


• Made in the USA


• Mercury Free

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LSD is great.... just keep away from heat!

According to Sanyo the new eneloop LSD (low self-discharge) NiMH batteries can maintain 85% of its original charge after 1 year of storage. This claim is slightly misleading because it is based on simulation test at 20 degree C. At higher temperature the self-discharge rate is likely to be much higher.



I have tested five of those AA cells (details are given in my review for the eneloop 4-pack). The average energy loss is about 26% after less than 6 months of storage based on manufacturer date codes. This self-discharge rate is about 3 times higher than what Sanyo claimed. However it is still 6 times lower than that of ordinary NiMH batteries. Therefore I'm in the process of replacing most of my existing rechargeable cells to the Sanyo eneloop.



Thanks to lower self-discharge rate you'll discover a lot more applications for eneloop cells in your house such as in clocks and remote controls. Do NOT use those cell in smoke detectors since their discharge voltage profile is very different from that of alkaline cells. Also don't use them as emergency flash lights batteries in your car because the higher temperature during summer time will probably nullify the advantage of LSD.



[Update on Jan 13 2007]

I have tested six new eneloop AAA cells dated "2006-06'. The average residue charge is 589mAh and the freshly charged capacity is 827mAh. This implies a self-discharge rate of 29% in 7 months which is consistent with the rate for AA cells (26% loss in 6 months).



[Update on Jan 29 2007]

The Rayovac "Hybrid" rechargeable NiMH batteries are now available at Walmart priced at only $[...] for 4-pack of AA or AAA cells. It is also advertised to have low self-discharge rate but not as low as that for eneloop. The eneloop is supposed to retain 85% charge in 12 months (when stored at 20 degree C) whereas Hybrid is supposed to retain 80% charge in 6 months (no mention of temperature).



[Update on June 3 2007]

In my 2-month self-discharge test using four different brands of NiMH cells. Hybrid and eneloop came up neck-and-neck!



Room temperature: 60-62 degree F (16-17 degree C). All capacities measured are average of 2-cells.



- Sanyo eneloop 2000 purchased Jan 2007.

Initial capacity measured: 2070mAh

Capacity after 62 days: 1796mAh (-13.2%)

(Note: my previous result for eneloop showed -18% but I repeated the test and it did better this time)



- Rayovac Hybrid 2100 purchased Jan 2007.

Initial capacity measured: 2155mAh

Capacity after 62 days: 1859mAh (-13.8%)



- LaCrosse 2000 purchased Jan 2006.

Initial capacity measured: 1902mAh

Capacity after 62 days: 1417mAh (-26%)



- SONY 2300 purchased Sep 2004.

Initial capacity measured: 2210mAh

Capacity after 62 days: 1309mAh (-41%)



So neither eneloop nor Hybrid did as well as advertised but they are still significantly better than previous generation of NiMH cells. So you can't go wrong with either brand.

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Cost effective alternative

These batteries are a very good choice for an inexpensive alkaline. Heavy duty batteries are not cost effective because although cheaper they have a very short run time. To get the best bang for your buck go for alkalines like these.



The "Procell" designation is basically Duracell's way of marking these batteries as ones intended for industrial applications. They make them as a separate line so they won't directly compete with their consumer lines.



My experience is that these batteries do not last quite as long as the top consumer lines from Duracell and Energizer. However they are within 10-20% (depending on the application) and are considerably cheaper. So they are much more cost effective.



Unless you are using them in an application where it is difficult to change the batteries I recommend going with these instead of spending more.More detail ...

An eneloop by any other name...

[Updated Dec 24 2008]

I was only half-right when I boldly proclaimed that "Duracell Pre Charged AA are rebranded Sanyo eneloop cells" in my original review. It turns out that the first batch of Duracell AA cells I bought from Amazon are made in Japan and those are identical to eneloop (both mechanically and electrically). But lately I bought some more Duracell AA from a warehouse club. Those are made in China and they are identical to the Rayovac Hybrid.



[Original review follows]



Judging from similarity of technical specifications and physical shapes of (+) and (-) terminals I am convinced that the Duracell Pre Charged AA is actually SANYO eneloop AA underneath a different wrapper. Therefore all the good things you heard about eneloop apply to Duracell 'Pre Charged' too.



My own testing has shown that the capacity of eneloop AA cell is slightly above the claimed 2000mAh and it is able to retain at least 85% of its charge after 5 months in storage. The Rayovac Hybrid AA starts with slightly higher capacity at 2100mAh but it 'only' retains 80% capacity after 5 months. For all practical applications both are equally good. Just pick whichever brand (Sanyo Rayovac or Duracell) is on-sale and you can't go wrong.



One small problem with the Duracell 'Pre Charged' cell is that: it looked too similar to the well-known 'Copper Top' alkaline cell. So there is a good chance that people may mistaken it for a disposable cell. Personally I prefer the distinctive-looking white case of the eneloop cell.

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