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Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack (Discontinued by Manufacturer)
|Price:||$14.18 & FREE Shipping|
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- 4-pack of 2,000 mAh rechargeable AA batteries for digital cameras, remotes, and more
- Pre-charged and ready to use right out of the pack; preserves charge for long periods of time
- Extremely slow self-discharge rate maintains 85 percent of capacity after 1 year of storage
- Combines best features of AA alkaline (ready for use) and rechargeable (reusable) batteries
- Can be charged up to 1,000 times (including partially) without experiencing memory effect
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Top Customer Reviews
My original review on the Sanyo eneloop NiMH cells was written nearly two years ago. Since then, I have learned a lot more about the characteristics about eneloop and other low-self-discharge cells. So it is time to clear up some inaccurate information I wrote about eneloop's self-discharge rate.
1. I was told that the Sanyo eneloop cells were not 100% fully charged when they leave factory. This makes sense because new cells are fast-charged in the factory to save time. In order to avoid problem with heat and gas built-up, they cannot be charged to 100%. I have tested some eneloop cells that were manufactured 20 months ago, and they still maintained about 70% charge. On the other hand, cells manufactured 6 months ago contain about 75% charge. This confirmed that the discharge rate is much lower than I previously estimated.
2. The self-discharge rate of eneloop (and other LSD cells) is not linear! My own testing showed that a fully charged eneloop may lose 10% of its initial charge during the first month of storage, but in the second months it may lose just 2-3%. The rate becomes even slower after three months. In fact, my 5-month self-discharge test using various brands of LSD cells gave nearly identical results as my previous 3-month test.
3. When an eneloop cell is freshly charged, its capacity actually measures at about 5% higher than its rated capacity (2100mAh vs. 2000mAh). In my previous tests, I used measured capacity as base to calculate the percentage loss. This results in apparently higher percentage loss. Had I used the rated capacity as base value, the self-discharge rate would be about 5% lower.Read more ›
I should also mention that Sanyo includes reusable battery holders with each set of four. These holders do not look very sturdy, but they perfectly usable.
Technically, Sanyo solved the main problem with NiMh technology - frightening self-discharge rate (up to 40% a month for standard cells). By doing this Sanyo reduced cell capacity down to 2000 mAh from today's top line of 2700 mAh.
Simple calculation shows that due to self-discharge a good 2700 mAh battery holds only around 2000 mAh after a month and a half.
So the answer to the question "which battery is better - Eneloop or standard NiMh" - lies in the usage pattern.
If you always keep batteries in your camera in top-notch charged condition, then standard 2700 mAh set is a winner. For occasional shooters who always forget to charge batteries (like me), Eneloop makes lot of sense because in three month I get around 1900 mAh out of Eneloop and only 1400 mAh from the standard cell. So Eneloop is a winner for everyone who keep batteries inside the camera or any other device for more than 6 weeks.
And, well, if paragraph above looks too technical with too many details and numbers - then Eneloop is a clear winner too, because it just behaves the way battery should behave - without forcing users to know how it works.
This observation made me buy additional sets of AAA Eneloops to use in my wireless mouse, keyboard, voice recorder and LCD flashlight. It should be taken into account that Eneloops are four times more expensive than Alkaline cells, so it is reasonable to use them for devices that require fresh batteries at least twice a year.
After 6 months of room temperature storage they had 86% of their initial capacity.
-Conventional size and dimension. I had other batteries that I have to use a screwdriver to remove from my camera because it is fatter than other "AA's".
-Looks so sleek and sexy designwise
-More expensive than ordinary NiMh
-Not available at many stores
-Maxes at around 2000-2100 mAh
Most Recent Customer Reviews
I was sent the Panasonic version of these batteries - not the Sanyo. But they seem to be the latest generation of the original and I understand that Sanyo doesn't make these... Read morePublished 3 months ago by jdjax
Eneloop are my go-to batteries. I have been using and recharging these guys for years and they have never failed me. Read morePublished 3 months ago by Jen