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Sony Cycle Energy AA Ni-MH Rechargeable Batteries (4-Pack)
 
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Sony Cycle Energy AA Ni-MH Rechargeable Batteries (4-Pack)

Other products by Sony Batteries
4.6 out of 5 stars See all reviews (15 customer reviews) More about this product

Price: $23.47 & eligible for FREE Super Saver Shipping on orders over $25. Details
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7 new from $8.88

Frequently Bought Together

Customers buy this item with Sony BCG-34HRMF4 Battery Charger with LCD Display and 4 AA Ni-MH Rechargeable Batteries

Sony Cycle Energy AA Ni-MH Rechargeable Batteries (4-Pack) + Sony BCG-34HRMF4 Battery Charger with LCD Display and 4 AA Ni-MH Rechargeable Batteries

What Do Customers Ultimately Buy After Viewing This Item?


Technical Details

  • New improved NiMh rechargeable battery technology
  • Already charged and ready to use
  • Stays 85% charged after 1 year of storage
  • Recharge up to 1000 times
  • Battery Capacity: 2000 mah
  See more technical details

Product Details

  • Product Dimensions: 0.5 x 2.5 x 4.5 inches ; 3 pounds
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • Note: Gift-wrapping is not available for this item.
  • ASIN: B000PHMN44
  • Item model number: NH-AA-B4K
  • Average Customer Review: 4.6 out of 5 stars See all reviews (15 customer reviews)
  • Date first available at Amazon.com: October 2, 2001

Product Description

Product Description
Sony's newest rechargeable battery technology seeks to bridge the gap between regular alkaline batteries and NiMH rechargeable batteries. Cycle Energy rechargeable batteries do not require initial charging and have a very low self discharge rate. They maintain 85 percent of their charge after one year and can be recharged up to 1,000 times. This new technology offers consumers the convenience of a ready-to-use rechargeable battery that is longer lasting and environmentally friendly.

Important Information

Legal Disclaimer
Warranty does not cover misuse of product.

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Customer Reviews

15 Reviews
5 star:
 (10)
4 star:
 (4)
3 star:
 (1)
2 star:    (0)
1 star:    (0)
 
 
 
 
 
Average Customer Review
4.6 out of 5 stars (15 customer reviews)
 
 
 
 
Share your thoughts with other customers:
Most Helpful Customer Reviews

 
39 of 42 people found the following review helpful:
5.0 out of 5 stars The best battery., July 1, 2008
I am an electrical engineer, and I have tested many, many batteries. The Sony CycleEnery batteries are the best batteries in the world. No other battery has performed as well for me. I highly recommend this battery above all others.

There are two things that make the Sony CycleEnery battery perform so well:

First, if you weigh the Sony battery on a scale, you will find that they are several grams heavier than any of the other brands. This means that there is more material inside, which yields a higher battery life span.

Second, the voltage curve of this battery stays above 1.2 Volts throughout the majority of its life span. The reason this is important is that most electronic devices, such as digital cameras, stop working once the voltage goes below 1.1 Volts. Normal NiMH batteries can have extremely high mAh ratings of 2500 or more -- but you can't actually make use of all those mAh's because the voltage drops below 1.1V relatively early -- this is not the case with the CycleEnergy. Sony has done something to keep the voltage up at 1.2V, so even though the battery is only rated at 2000mAh, they last much, much longer than normal NiMH batteries. I usually get 2-4x the life span out of CycleEnergy batteries, compared to normal NiMH (even the Sony ones!).

To summarize -- these are the best rechargeable batteries on the market right now (2008).

Regards,

~Chris Sebastian
Comment Comments (5) | Permalink | Was this review helpful to you? Yes No (Report this)



 
10 of 11 people found the following review helpful:
5.0 out of 5 stars Pretty good Batteries, January 24, 2008
I got this set in addition to Sony 2500 mAh AA Rechargeable Nimh Batteries. This set seems to work better than Sony 2500mAh batteries.
Comment Comment (1) | Permalink | Was this review helpful to you? Yes No (Report this)



 
7 of 8 people found the following review helpful:
5.0 out of 5 stars Excellent batteries, July 6, 2008
They really last a lot. Other batteries that I have do not hold charge for a long period.
Comment Comment | Permalink | Was this review helpful to you? Yes No (Report this)


Share your thoughts with other customers: Create your own review
 
 
 
Most Recent Customer Reviews

5.0 out of 5 stars best i've used
I have a digital camera that runs on AA and I need to keep a lot on hand to change out often. With these batteries I am swapping batteries much less often as they seem to hold a... Read more
Published 1 month ago by MariaT

5.0 out of 5 stars Very good
I use quite a few Eneloop low-self-discharge batteries: AAs in my Canon S5 IS and some toys, AAAs in Harmony 659 and Dish remotes. Read more
Published 1 month ago by RSRCHB4UBY

5.0 out of 5 stars Awesome
Love the batteries, just as dependable as the eneloops. Since prices fluctuate all the time, just buy the cheaper of the two, between the eneloops or the sony's.
Published 3 months ago by J. Griswold

5.0 out of 5 stars Good Qaulity
These rechargeable batteries were perfect for my Sony digital camera. They came fully charged out of the package, and worked perfectly in our existing Sony battery recharger. Read more
Published 4 months ago by AD Kidd

3.0 out of 5 stars These are re-branded Sanyo Eneloops - and not the best batteries you can get.
First, as was pointed out in the comments in response to Chris Sebastian's review below, these are simply re-branded Sanyo Eneloop batteries. Read more
Published 4 months ago by K. Topitzes

4.0 out of 5 stars Sony AA rechargeables
I understand this Sony rechargeable is better, charged them and placed in camera will see.
Published 4 months ago by Thomas F. Goettl

4.0 out of 5 stars Sony cycle battery
I placed the new batteries in my digital camera and before the afternoon was over, it was showing low battery on my camera. Read more
Published 4 months ago by A. MASSEY

5.0 out of 5 stars Best batteries i have used!
These batteries came fully charged right out of the package. I bought 2 of them for my new Canon SX10IS camera. Read more
Published 5 months ago by Mark D. Adkins

5.0 out of 5 stars Sony delivers again
After trying nearly every rechargeable battery and being disappointed that they did not arrive pre-charged as claimed, the Sony Cycle Energy batteries arrived ready to go, just as... Read more
Published 5 months ago by John J. Nelson

5.0 out of 5 stars Keep their charge, last a long time
I've been using these batteries in my camera for over a year now and they are still as good as new. I also recently started using them in the Wii remotes and Wii fit balance board... Read more
Published 6 months ago by S. Smith

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