Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
by SANYO
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Digital Cameras Photo Reviews of Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
Customer Review: Very disappointed in Sanyo customer service & product quality
Summary: 1 Stars
Purchased a 4 pack in late December as a backup for a holiday trip. Got used in a point-and-shoot camera for a few days then charged on my La Cross charger and transferred to the digital display on my elliptical machine. Less than 2 months later one cell is completely dead. Isn't recognized by any device, charger or voltmeter. Dead.
Calls and emails to Sanyo customer service have been completely ignored and I've been trying for 2 solid weeks. Useless. I can't stand companies who drop emails into a black hole and don't answer the telephone. Sanyo customer service number goes to voice mail no matter what time of day you call them. Lousy service, apparently lousy quality control too!
I'll be purchasing from other manufacturers in the future for any electronics needs. Buh bye Sanyo.
Edit: additional information - I was finally able to contact customer service (after a month of trying) who very nicely asked for a copy of the purchase receipt which I provided. They determined that the battery needed replacement and asked me to return the one dead cell to them at my expense which I did. No further communication and no replacement battery has ever been received. I give up as the cost of all of the time and effort following up on one lousy dead battery far exceeds the original purchase price. Customer service shouldn't be so hard to reach and you shouldn't have to jump through hoops to get satisfaction under the warranty.
Edit: additional information - months later I stumbled across the email from customer service and decided to give them one more chance. They asked for proof of mailing which I told them I couldn't be bothered to locate and told them I didn't think the service was that great. A few days later they asked for a shipping address and mailed me 1 AA battery. Hats off to the Sanyo rep for sending the battery but, really, I think it should have been sent after the initial complaint and proof of purchase.
Customer Review: I hate single use batteries
Summary: 5 Stars
As an engineer, I find it offensive that people actually sell single use batteries or design devices that require single use batteries and the fact that people buy single use cells drives me insane.
Stuff like digital cameras and flashes, cell phones (yeah, they used to use AAs a long time ago), remote controllers of all types, TOYS, flashlights. They should all use some type of rechargeable power because you use them a lot - you will be changing the batteries a lot.
Single-use batteries are expensive for that you get - the energy itself costs less than a penny. The label on the battery probably costs more than the actual energy is worth. Plus they are bad for the environment.
Unfortunately there really weren't any good alternatives to the single use Alkaline dry-cell. Lithium-ion/polymer is expensive, regular (non-Eneloop) Ni-MH leaked alot of energy overtime, and everything else was junk.
And then comes Sanyo with their advanced Ni-MH technology and they choose to market their stuff as "pre-charged". C'mon. That's not even 1/10th of what these batteries are.
These batteries are high-current, making them great in flashes and digital cameras. They are low-discharge so you can use them in devices that previously only made sense with alkalines, like tv remote controls. They also have a very high power density - so they hold more juice that a regular alkaline. And you can recharge them up to 1000 times.
Want a great comparison that most of you guys can pull off? Use the Eneloops in one of your Wii-controllers. Then use some (ack!) Alkalines in the other controller. My fiancee and I play the Wii constantly. Alkalines last like 4-6 weeks depending on what we are playing. I charged up some Eneloops and put them in one of the Wii-trollers like 3 months ago and they are still going. Still at all power bars according to the Wii. Incredible.
Customer Review: After all It is not only about milliampere hours
Summary: 5 Stars
I received several sets of Eneloops in February and label told they were produced in April - so they sat at warehouse for nine month. I put them into camera and they worked just fine. Kudos Sanyo!
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.
Customer Review: Simple little charger that gets the job done
Summary: 5 Stars
This package, eneloop Compact Charger (includes 2 AA), contains the Sanyo 2-cell charger 'MDR02'. I use one in my office to recharge batteries for my MP3 players, headphones, wireless mouse, etc. It has served me well for the past 2.5 years with absolutely no problems.
The MDR02 works very well as a travel charger for my trips, too. It is tiny (measures only 3"x3"x1"), very light (weights about the same as two AA cells), and accepts universal input voltage of 100-240V AC. It is also a "smart" charger in the sense that it charges each cell individually, and stops whenever each cell is full.
The charging current of MDR02 is 550mA for AA, 380mA for AAA. That means it takes about four hours to charge up either 1 or 2 eneloop AA cells (2000mAh). This may seem slow, but it is actually a lot faster than the Sanyo 4-cell charger 'MQN06' included in Eneloop 4 Pack AA w/ Charger. The MQN06 charges at only 300mA, so it takes up to 7 hours for a pair of eneloop AA cells. It also forces you to charge in pairs, which is very inconvenient if your appliance requires odd number of cells.
If you need a faster, more advanced 4-cell charger for home use, I highly recommend either the La Crosse BC-9009 or BC-700. As a reminder: the eneloop cells do NOT require special chargers. Any good quality "smart" NiMH charger will do the job. The reverse is also true - You can use this eneloop charger for other brands of AA or AAA NiMH cells as well.
Customer Review: Eneloop - restored my confidence
Summary: 5 Stars
I purchased a Canon A590IS P&S camera. The included batteries (Alkaline) didn't last very long, nor did I expect them to. I thought I would be okay with 2300 mAh rechargables. These didn't last more than two hours of casual camera use. I was very discouraged because I liked the camera but had no confidence in it's ability to give me a reasonable battery life. Then came the Eneloops. Lot's of research caused me to purchase these batteries. I put two of them in the camera right out of the package. They're still going strong some 200 shots later and show no signs of decreased charge. They have given me the ability to use this camera as I had first intended. I have since purchased four more and the charger that goes with them. These Eneloops have a remarkable useful life and just don't want to quit the way others do. They are, by far, my AA battery of choice. They will replace the other AAs I have as these others fade away. I don't see how you could ask for more.
The red, low battery warning light went on (on the camera LED) about three days ago. I felt that I got well over 200 shots with these two eneloops and was satisfied. So, just out of curiosity, I thought I would keep going to see how long before the camera shut down. It didn't shut down. The next day the low warning icon was not there and hasn't returned during another 40-50 shots. I can't explain this - it's like the batteries had a "breather" and are off and working again. This tempts me to advise you to just give them a rest and see if you have the same result. Amazing little source of power.