Sanyo Eneloop AAA NiMH Pre-Charged Rechargeable Batteries (4 Pack)
by SANYO
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Digital Cameras Photo Reviews of Sanyo Eneloop AAA NiMH Pre-Charged Rechargeable Batteries (4 Pack)
Customer Review: Finally, the last drawback to rechargables is gone
Summary: 5 Stars
I've always been interested in rechargeable batteries. Really, hasn't everybody who has ever thrown away an alkaline wondered if there isn't a better way? I mean, they look perfectly fine, even though we know in our hearts that they are dead, never to return.
Enter the NiCad, the staple of the hobbiest of the 1970s, these batteries can be recharged many times, but quickly fade out. Their destiny was to be tossed into the battery drawer, that graveyard for half-used and dead batteries that everyone had someplace in their home.
Later, the NiMH, the successor to the lowly NiCad, arrived. When that one showed up, everyone declared victory, emptied the battery drawer into the trash, and started anew. They held much more power than the NiCads of their youth, and seemed nearly perfect. They worked very well indeed in high-demand applications like digital cameras, where the flash and the screen on the backs ate up the little NiCads like they were peanuts. The problem was that in lower demand applications, like remote controls, the thing they still had in common with NiCads proved their undoing. When left alone for a month or two, in a device or not, they would lose their energy. Leaking out like the helium balloon of a child, the power escaped into the ether, leaving the owner to return to a dead remote, unable to do so much as change a channel.
Enter the Eneloop, otherwise known as the precharged NiMH. But, this battery brought something more to the table than a simple quick-charge at the factory. It has an extremely low self-discharge rate, which is fancy talk for saying that a year after you charge it, your remote will still work. Amazing. Finally, after years of well-dressed, but incapable technologies, the contender actually has the chops to take on the reigning champion, the mighty bunny battery.
Replacing all of your remote batteries with these will save countless trips to the garbage, as well as trips to the computer to order more bulk batteries from Amazon. Just think what all those UPS trucks, filled with oddly-named alkaline batteries from China, could be carrying instead. The overworked drivers might even be able to take a day or two off every now and again, all because of a little, relatively unadvertised innovation that fits in your pocket.
If you've ever wondered if there might be a better way while throwing away yet another handful of dead alkalines, give these a try.
Highly recommended.
Sean P. Logue, 2008
Customer Review: Recycle the alkaline batteries and go Sanyo Eneloop!
Summary: 5 Stars
Plain and simple, Sanyo Eneloop batteries hold their charge longer AND hold their voltage higher under discharge / load than almost all other NiMh rechargeable batteries on the market today, including other low self discharge competitors. Couple the Eneloop's with a Maha MH-C9000 charger and you're set with, what's arguably, the best combo available.
There have been a battery of tests done at (Google: candlepowerforums), and by an R/C enthusiast at (Google: stevanv). Relevant links below.
Eneloop - Performance details for Experts: candlepowerforums
Review: Testing Sanyo's Eneloop Low Self-Discharge Rechargeable Battery: stefanv
Facts:
- Eneloop is charged 75% before leaving the factory.
- Eneloop is excellent for high drain devices because of its ability to hold over 1 Volt under load. (Camera flashes, flashlights, etc...)
- Eneloop is excellent for low drain, such as clocks, remotes, etc... because of the excellent low self-discharge characteristics.
In AA's, rebranded Eneloop's are available from the following:
- Duracell Pre-Charged (white top at positive end, made in Japan)
- Sony CycleEnergy (Made in Japan)
- President's Choice (Made in Japan)
AAA's:
Stick with Eneloop. There just isn't good information available for rebranded Eneloop's.
** Non Eneloop review material **
I feel it should be mentioned, since there is some mis-information being spread regarding the Maha MH-C9000 charger in another review that touts the LaCrosse BC-900 over the Maha. The C9000 is EXCELLENT, and should be at the top of your list for chargers, period! The C9000 beats the LaCrosse BC-900 in every category except two; price and the BC-900's "REFRESH" mode. "REFRESH" will cycle (charge and discharge), in an attempt to "awaken" the cell, and will do this until there is no further capacity increase. Very nice feature, but is countered with the C9000's "Break-in" mode. For further explanation, read information at the link below.
Here is a direct comparison of the two chargers, feature for feature: (candlepowerforums - showpost.php?p=1891028&postcount=9
Comparison of many chargers, showing the C9000 to be #2 under an expensive hobby charger: (candlepowerforums, search "Charger Comparison". The BC-900 is a good charger, but the C9000 is all-around better; no goofy key sequences, more flexible, large and legible display, very reliable.
Customer Review: Beats Duracell Pre-Charged and Rayovac Hybrid
Summary: 5 Stars
I recently bought Duracell Pre-Charged and Rayovac Hybrid batteries from Wal-Mart. I fell in love with these batteries because they do not lose their charge quickly like other rechargeable batteries, but when I went back to Wal-Mart to buy more, they apparently decided to discontinue offering them. So I searched the internet and found that Eneloop was apparently the original "hybrid" or "Pre-Charged" battery, so I decided to give them a try. I fully charged the Duracells, Rayovacs, and Eneloops and I put them in the same same exact flashlight model and I tested them. The Eneloops lasted much longer than either the Duracell or the Rayovacs, so I have decided to replace all my old rechargeable batteries with Eneloops. I feel that Wal-Mart has missed the mark by apparently discontinuing to offer this new class of batteries. Oh well, their loss. I actually found a better battery at Amazon . . . the Eneloop. You had better watch out Wal-Mart! With the high price of gas, maybe everyone will be buying these batteries from Amazon because of the free shipping. Exxon and Texaco had better watch out too. Not only will we be driving less, but if we can find a way to run our cars on these batteries, they will be losing even more business. Don't laugh. It costs only $3.00 to charge a Tesla Roadster. It goes 0 to 60 mph in about 4 seconds and it runs on battery power without a drop of gas. It is time for companies like Amazon and Google to take charge of America's future! The old way of doing business in this country is over! If traditional companies will not embrace new technologies like the eneloop, then it is time for other companies to take over. Perhaps in the next few years, these batteries will be re-charged by power generated from the sun, wind, and water. Plug-in hybrids like the Chevy Volt could make the gasoline powered Toyota Prius obsolete. I guess you get the point. I really like these batteries and what they could possibly do for our future. Buy them from Amazon. You won't regret it.Customer Review: The perfect battery for remote controls
Summary: 5 Stars
The eneloop batteries offer longterm charge retention but lack the high current operation of conventional nimh cells (which is why the conventional nimh cells are still made). I looked for something that I seldom change out the batteries on (my remote controls) and bought eneloop AAA size batteries for them. The result was exceptional - no longer did I have to change batteries in the remote because the battery self-discharge drained it - but rather because I got the value of the power stored in the battery by the remote controls' low power draw and intermittant duty cycle. My programmable remote has a backlit screen which I no longer feel guilty about using since the eneloop cells are in it. Previously with conventional nimh cells it had to be recharged monthly - now it is on a 3 month recharge cycle, a big improvement.
Eneloops are not for everything (power tools, for example, perform poorly on this technology) but matching the load to the battery gives excellent results and cuts down on the time between recharges. I'm very happy using eneloops in this particular application, but would not use them in high current applications (e.g. SLR flash which draws 2-4 C rates runs best off conventional nimh Sanyo 2,700 mAh AA NiMH Rechargeable Batteries (4-Pack)). Best news is both types of cell can be charged in the same charger, although I charge the eneloops at a low [200 ma] rate while the 2700 can safely be charged at [500-1000 ma] rates and still get a full charge. I've purchased the eneloop in both AA and AAA sizes for any product that needs to have a long term charge stored in it and does not drain the battery at high rates.
Customer Review: Savor Energy with this energy saver
Summary: 5 Stars
Rechargeable batteries are so cheap to recharge that your first cost is virtually your last cost. The problem, historically, has been that self-discharge results in the charge energy dissipating while the battery sits on the shelf or in an unused flashlight, GPS, camera or other device. Woe, the poor user, reaching for the flashlight on a dark evening or intent on a priceless photo opportunity, when discovering that there was little or no charge in the essential energy supply.
Enter the Sanyo Eneloop!! (Shining "armor" to bathe your night!)
I've suffered the NiCd batteries' woes (self-discharge and "memory").
I've suffered previous NiMh batteries' woes (self-discharge).
For a number of years, the Sanyo Eneloop has been my energy saver; The charge energy put in is still there, even months later. The previous argument for not using rechargeables (they are dead when you need them) evaporates with the Eneloop performance.
And, sure, there are NiMh batteries with higher spec'ed capacities but, in my book, 85% of a 750 mA-Hr (AAA's) capacity is worth a lot more than 5-10% of 1000 mA-Hr when you go to use a battery 6-8 months after it has been charged.
I slow-charge (200 mA) my Eneloops (although I am sure that faster charges are not overly harmful) and have been using the AAA and AA sizes with great satisfaction, success, and great economy. There is now little reason to use any other. Considering that first cost is last cost (virtually "free" charges), even "economy" dictates no other choice.
Be kind to the environment and to your wallet by using these rechargeable batteries.