Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
by SANYO
|
List Price: Our Price: $5.45 You Save: $9.54 (64%) Availability: Usually ships in 1-2 business days Category: Speakers See more product details |
|---|
Customers in the UK,
Buy this product at amazon.co.uk
for British Pounds
Digital Cameras Photo Reviews of Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
Customer Review: Better than Some_But NOT the best
Summary: 3 Stars
Better than a regular (AA) alkaline battery, but Not better than some rechargeables on the market. (When?)
- I bought these Eneloops(2000 mAh) because of the reviews regarding slow discharge rates, and how rechargeables above 2500 mAh can lose power faster, etc.
What I know is that, this winter/under Limited sunlight, the eneloops operated strongly 4 nights (running about 12 hours Constant) in my solar strand led Lights, BUT my (Powerex (AA) 2700 mAh Rechargeable NiMH Batteries) by MAHA ran strong for 8 nights b/f diminishing for the same time frame, using the same light types(over the same week [simultaneously]). Yes, the Sanyos are better than alkalines = ability to be re-used, will save you money -over time, and perhaps better than a comparable (AA) size 2,000 mAh rechargeable. But I will not buy these over the 2,700 power by MAHA/ Powerex -- especially when the device is operated [continuously].
- illumination was also much better w/ the 2700s in the light strands. (for Maha batts- shop around/sale prices vary)
-eneloops arrived w/ some charge but not [fully] powered. They can be charged in any quality NiMH charger, although the package only mentions Sanyo chargers.
- An eneloop is simply a 2000 mAh rechargeable, when Ur mainly concerned about running a device in the "ON" mode continuously. It is when the battery is [Not] in use, does Low SELF-discharge (LSD) battery usefulness pay off.
Difference:
A)2700- 2900 mAh (from a quality brand)= for the greatest available power & speed at an event today/ 2 wks from now, Significantly MORE pics at a photo shoot/celebration, camera flash maxim speed, Stronger illumination in your lights, etc. -OR-
B)eneloops (2000 mAh)= b/c your item sits idle for Long periods/mths(LOW camera use), device is slowly drained(clocks/ various remotes), you dislike recharging as often, want a set of back-up batteries sitting [in storage] holding power because your device can still run well with 1600-1700 mAH, if its 10- 11mths down the road, more or less.
Some have [over] rated/recommended these batts as if they're "all-purpose" rechargeables. [In storage] =they're beneficial- ready to use. Yet, [In continuous operation] =they can get outperformed. It comes down to usage...
Update: Sanyo also has a 2700 mAh -NIMH. And Maha has a LSD w/ even more capacity( IMEDION 2100 ). When eneloops & other LSDs are also available in higher milliampere hours (mAh) - that'll be the day!
Customer Review: Some new facts about LSD cells you should know...
Summary: 5 Stars
[Updated Oct 24, 2008]
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.
Based on the above revelation, I believe Sanyo's claim about eneloop (maintain 85% charge after one year, 80% after two year) to be accurate. Therefore the title of my previous review ("The News of LSD Has Been Slightly Exaggerated") has to be replaced.
Over the past two years, I have tested several different brands of LSD cells available from Amazon.com, including Rayovac Hybrid, Kodak Pre-Charged, and Duracell Pre Charged. They have all performed very well - practically no difference from the Sanyo eneloop. So the bottom line is: just pick which ever brand of LSD cell is on sale, and you can't go wrong.
Customer Review: A battery is a battery, so what?
Summary: 5 Stars
I mean, this isn't rocket science, is it? One AA battery should be about as good as any other AA battery, right? Wrong. Well, at least they should be in the same ballpark, no? No. It's amazing how little I know about batteries, but luckily NLee the Engineer knows just about everything about them, so if you want to read only one review, skip mine and go directly to his.
So why did I buy these fairly expensive 2,000mAh NiMH rechargeable batteries? Because I read NLee's review. I also wanted to replace the 24 (yes, 24) 600mAh NiCad batteries that came with a 12-set solar lighting system for my walkway. Being the great genius I am, I quickly deduced that I should get almost 3-1/2 times more lighting usage out of the 2,000mAh batteries than I would the 600mAh batteries that came with the solar lights. The 600mAh batteries couldn't keep these solar lights on long enough after a few nights of use. This has to do with the solar cell not collecting enough light during the day (short day, it being winter time at the time of this review) to charge these batteries enough to run all night long. For once, I was right (although I'm not sure if the mAh number is the only reason ... it may also be the difference between NiCad and NiMH). Actually, I got well over 4 times the usage. Now I find that quite startling. More than that, it dumbfounded me. I don't think I'll look at batteries quite the same way any longer.
So how do I rate these batteries. This is pretty simple. They are so far superior to the other batteries I had (yeah, those were really cheap ones), that I give the Sanyo batteries a 9 out of 10 or a 5-star rating (I'm far too ignorant about batteries to give it 10 out of 10). How would these batteries compare to other NiMH batteries with identical mAh rating? Sorry, I don't have a clue. All I know is that these have performed even better than I thought they would.
There is one other thing that baffles me, and that is the price of the 4-pack versus the price of the 8-pack. I required 24 batteries, so the cost of getting 6, 4-packs were $55.14, while the price of 3, 8-packs would be $59.97. Since it would no doubt cost less (another ingenious deduction on my part) to pack 3-sets, than it would to pack 6 sets, one would think the 8-pack would be cheaper. Wrong again. So forgo the 8-pack and get the 4-pack. Of course price is always subject to change, so make sure you confirm this before purchasing.
Customer Review: Good rechargeables, but a dead cell in just over a year w/ 6 charges on it?
Summary: 3 Stars
I purchased these batteries (4 pack AA, eneloop) about one year ago. The price was about the same as it is today on Amazon, so the price hasn't changed in about 12 months.
I have been happy with the performance of the batteries as they have held ~99% of their rated 2000 mAh claimed capacity over the year I've had them. Of course, I've only charged them a hand full of time, probably 5-8 times total given the small amount of use they see. They've worked great.
Then I tried to use a set in my Guitar Hero guitar. It refused to power on. I swapped the batteries around (meaning I took the batteries out and swapped their placement in the device, not that I had installed them incorrectly). Nothing. I took out a pair of disposables and the guitar fired right up. I figured that the batteries had lost their charge and decided to give the charger a shot.
No dice. I am using the La Crosse Technology BC-9009 AlphaPower Battery Charger. The nice thing about the charger is it has a display that tells you what the charge rate is, capacity and so on. One of the eneloop batteries would NOT charge. The display shows "NULL" on the display while the other battery in the pair charged all the way up to its 2000 mAh rating with no troubles.
All I can say is "buyer beware." The eneloop batteries are great; hold capacity and work really well. The problem is that if you have one of these batteries die on you as I have, you would be better off just buying disposables, considering you can get 30 packs for pretty cheap these days. And like another reviewer here on Amazon stated, Sanyo support expects you to mail the failed battery back to them... cost of shipping a single battery makes these batteries even more expensive. If I were asking for a full set, I'd understand them wanting them back, but a single battery? I tossed the battery (disposed of properly actually) and will look into other rechargeable options.
Customer Review: Best Rechargables Yet
Summary: 5 Stars
I own close to 100 of these eneloop batteries. I have them in kids toys, flashlights, smoke detectors, remotes,wireless mice/keyboard and in three different digital cameras. I have used these since 2006.
I had only one bad experience in 3 years(2009 review). I put charged batteries into my Canon 590IS . Upon arrival at my 3rd childs kindergarten graduation the camera was saying low battery. I reinstalled the eneloops, but still the same error. Later in the event, my camera started working and reading full power.I think that there was a glitch in the camera. It has happened only once.
I have had to throw one battery out. It leaked , I think it was dropped too many times. BE CAREFUL DO NOT DROP.
I have bought these from Amazon and [...]. The [...] set(4 AAA+ 8 AA) comes with a charger and adapters for C and D batteries for about 25-30 dollars. I tried the D adapters to run a fan. It lasted about 3 hours, a Duracell D ran the same fan for 8+ hours.So I will still buy disposable c and d's but never a AAA or AA. I used to buy a case of them(Duracell 36 pack) every 6 months.
Some of the Eneloop sets I bought came with a charger that will work on 120 or 240 volts. Just look at the back of the charger and it will read 100-120 volts or 100-240 volts.So I have a charger if I ever travel out of the country(someday?).
These batteries went with us on our big family vacation to southern california in fall of 2008. We took 100s of photos. We hit Legoland, Seaworld, The San Diego Zoo, Universal Studios and Disneyland last. On the last couple of days the batteries finally required a charge. Yes, we took a charger with us and had extra batteries( and extra SD cards) in our camera cases.
I wish they made c and d cells and a 12 volt charger for use in vehicles. Other than that the best rechargable out there. Would give 6 stars for saving us from all those disposables.