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For Panasonic BK-4MCCE/4LE, 945 customer reviews collected from 2 e-commerce sites, and the average score is 4.6.

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5.1.2015

I've been using a variety of Ni–MH batteries for a while now but for sheer reliability and longevity the Eneloop ones are hard to fault. This is the 4th generation of the Eneloop range the first coming to the market in around 2005, over time the number of charges has increased from the original 1000 cycles up to a claimed 2100 as well as extending the charge they retain in storage for longer. Since Panasonic took over Sanyo in 2013 the they retain the Eneloop branding, this model is BK-3MCCE the prior generation is HR-3UTGB the cycles up from 1800 on that model.It's easy to spot the newest model purely because they are Panasonic brandedThe cells are quoted as retaining up to 70% of theircapacity for 5 years and are ready to use out of the boxI tested the pack I got and the capacities ranged from 2020-2078 mAh this can vary a bit but you're guaranteed a minimum of 1900 mAh. Unlike some other makers you can be sure you'll get the quoted capacity Despite the higher cost per battery the longevity of the Eneloop batteries has been very good I've had sets for a good while now (over 5 years) and they're still going strong where as some budget offerings have lost their capacity or worn out after a few years. I've also never had a problem with the Eneloop cells fitting, in the past a few makers have played around the standard AA size and some are a bit longer or larger in diameter this can cause problems on some devices fitting wise.On the packaging Panasonic recommend using their own chargers, but I've never had a problem with a good quality third party smart/intelligent charger with any make of battery it's well worth investing in one of these as it can extend the life of cells and avoid overcharging problems that some timer/manual chargers have.**A few chargers worth looking at**Maha MH-C9000 (very advanced high end charger)Powerex MH-C9000Technoline BL-700 or BC1000Foxnovo F-4SThe official Panasonic charger is: BQ CC16 this is an intelligent charger with individual monitoring and charging of cells, I don't recommend the basic BQ CC18 it works fine but it is timer control only.A decent budget 8 cell intelligent charger is the KooPower 8 Bay smart charger (this seems to be available in a few brand names same design though)Some of the top end chargers have multiple charging speeds and testing capabilities as well as discharge/re-fresh cycles. If you don't need these features then just go for a normal smart charger it's worth the small additional cost.There are some cheaper batteries out there, and some decent budget offerings too. But despite the higher cost this seems to be levelled out with the lifespan of the batteries. Hard to fault really a very reliable and solid offering and suitable for use in a wide variety of appliances even heavy drain items like flashes and digital cameras. For super high capacity users take a look at the Eneloop Pro range
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2.12.2015

These are nickle-metal-hydride (NiMH) rechargeable batteries which produce 1.2A of power.Eneloop batteries are designed to have a very low self-discharge. Older rechargeable batteries will self-discharge about 20% on the first day and about 5% per day after that. Eneloops still retain 80% of their charge after a year. They're great for LED torches, cameras and digital radios.Eneloops also have a higher capacity (measured in mAh) than many non-rechargeable batteries. The fact that they last longer and can be recharged makes them the best batteries on the market. They're Japanese and their quality is second to none.There are two main types of Eneloop battery - the black-coloured ones have a higher mAh capacity but will take fewer recharge cycles (~500),whilst the white-coloured ones have a lower mAh capacity but will take more recharge cycles (~2000). For example, people who work in the emergency services will probably want a higher mAh capacity so that their LED torches will last longer, and people who play video games will want higher mAh for their wireless controllers. The lower mAh capacity are more suited for cordless phones, TV remotes, or for people who don't use their torch or radio every day - e.g.,an emergency torch stored in a vehicle, kitchen or bedroom. In practical use, the black-coloured Eneloops last about 35%-40% longer between charges than the white-coloured Eneloops, but the white ones can be recharged 4 times more.Obviously you also need a good quality charger to get the most out of these batteries. There are a lot of different chargers on the market so shop around. Eneloop even sell a charger with batteries included. Personally I use the Ansmann 16+ charger - it's expensive, but probably the best there is. It's also huge! (Ansmann make smaller 8+ and 4+ versions.) The XTAR VC4 is also quite good and the Nitecore chargers work well too.
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1.6.2017

Amazon link - http://amzn.to/2rI3xt1You may be put off using rechargeable batteries because they tend to loose their potency over time and can also discharge themselves too quickly if left on the shelf. I have been using eneloop batteries since around 2007 and I still have most of them kicking around and yes, they all still work! I haven’t bought disposable batteries in that time, only using the odd pair of batteries included with a device like an Xbox One S or new TV Remote.The white eneloop versions are intended for low-power use such as remote controls. The eneloop Pro brand has a higher mAh reading (Milli Amps an Hour I think)which means they will last longer in high powered devices like a motorised device such as a drone or remote controlled car.The standard white batteries are billed as being able to take 1000 charges before loosing enough charge to become useless. With the pro moniker, they can be charged 500 times before becoming useless.I would say even at 500 charges these will last 10+ years for my occasional use so just imagine the money you will save, oh and the environment will give you a big ol pat on the back.I also bought the AA Pro batteries, only a 4 pack because I can generally make do with the white ones, that are now 10+ years old! An example; I use the whites in a wireless microphone sender and receiver - they always show 2 out of 3 bars for battery life whereas the Pro versions show all 3 bars for several hours / days so they definitely make a big difference. If you have easy access and don’t mind carrying spares, the standard batteries are very suitable for most circumstances, or just say to hell with it and go for POWER* (*read in a Jeremy Clarkson manner!).Amazon link - http://amzn.to/2rI3xt1
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14.2.2015

Critical Review.I used a Technoline BL-700 charger (Amazon £31.99) which can Discharge (measuring capacity) and Charge repeatedly until a battery achieves the same capacity on consecutive discharges then charges to FULL.I bought two sets of 4 AA Panasonic BK-3MCCE/4BE.First Set, first discharge capacity - 1437 - 1453 - 1444 - 1413 - Average 1437mAhFULL capacity - 2010 - 2020 - 1994 - 2030 - Average 2014 mAh(This does show that these batteries are what others call 2000mAh)On the packaging it states :- Fully Charged 100% - 5 years later 70%Using the above figures 1437 divided by 2014 equals 71.35%It follows, if the claim is correct, these batteries are 4/5 years oldThey may be old Sanyo Eneloop production but I would doubt they 4/5 years old,probably not more than 2/3 years. If, however, produced by Panasonic (who recently took over Sanyo) then the figures must cast serious doubt on the claims made regarding retention capacity.Second Set, first discharge - 1496 - 1500 - 1506 - 1486 - Average 1497mAhFULL capacity -2100 - 2070 - 2050 - 2130 - Average 2087mAhPercentage retention 71.73%My conclusion - The first charging was very similar to Uniross Hybrio 2000mAh I bought 3 years ago whose last recharge was Dec 2014 and had max capacity then just under 1900mAh.I deduct one star as I cannot see any real difference between these "New" batteries and others 3/4 years old.Useful links:- www.panasonic-batteries.com/eu/news/ then click on links 25/01/14 and 17/03/14www.wikipedia.org/wiki/eneloop
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5.12.2015

I bought this pack to use around the house and for flash triggers and other items I mostly use AA's and have quite a lot of the Eneloop cells for that size.Panasonic claim these will hold up to 90% of their charge for a year and an eye watering 70% for 10 years. I doubt the ultra long storage will be a factor for most but the 2100 recharge cycles is pretty impressive. Panasonic state on the reverse you should use Eneloop chargers, you can happily ignore this it's just marketing from the company their chargers are pretty decent but there are a number of third party makers with very high quality smart chargers.Few downsides to these the Eneloops do hold the voltage output even a lower levels of charge better than most.The pack I tested all 4 batteries came in at around or just under the 700mAh mark a bit below the stated minimum that's not bad but there are alternatives around at not far from 1000mAh capacity even if few can match the number of recharge cycles. Real world use was somewhat better though outperforming some makers in longevity and the huge re-charge cycles is a bonus (over time it reduces the higher initial cost) Quality cells no doubt but they don't quite reach the level of the AA equivalents (I've yet to have a cell test below the min stated level)
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21.10.2016

After using Energizer rechargeable batteries for years, and having issues with the amount of time they offer decent power for, I decided to go for Eneloop Pro.Have used them on shoots, weddings and most other things too, and I'm completely impressed with the amount of power they offer, as well as the length of time they offer it for. The Low Disperse rate is impressive and I've found that I was able to bin my Energizers for good, as four Eneloop Pros lasted longer that eight Energizers. Less to carry around in my kit bag too, which also equals less hassle and weight.The Energizers I had would charge up and the following morning they would only have around 70% charge,so I'd have to time the charging rates to finish for when I'm about to leave for a shoot. With the Eneloop Pros I can charge them the night before and know that there'd be no loss of charge, due to the low self discharge rate. They cost a little more but you definitely get what you pay for with these.Very impressed...In fact I've just bought some more to use in household items.. Goodbye Energizer and Duracell... Hello Eneloop Pro.Pros:Long lastingKeeps charge for longer, even when not in useFaster recharge time in your equipmentWell madeCons:None I can think of.
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18.7.2015

Eneloop are my top choice when it comes to batteries. They offer great performance, reliability and charge retention through the years.There are various generations of eneloop batteries with Sanyo producing the first 3 generations. In 2013 Sanyo was acquired by Panasonic and the 4th generation was introduced. Other variants were also introduced by Panasonic.These BK-4MCCE Eneloop batteries are the 4th generation and first (standard eneloop) produced by Panasonic. The difference is in the charge cycles, up to 2100 from 1800:○ 1900 to 2000mAh (Minimum - Typical)○ Astounding 2100 charge cycles○ Awesome charge retention through the years: 90% after 1 year / 80% after 3 years /70% after 5 years○ Batteries are pre charged by the factory, (albeit to approx 75%) so they can be used straight away○ Virtually leak proof, even if left in a deviceTip: In order to achieve maximum longevity, use a quality smart charger designed for NiMH batteries. In contrast to dumb chargers, these will monitor the voltage of each individual battery and avoid under / overcharging. Some smart chargers even sport thermal overload detection.These batteries will last for many years, and given the price they should definitely be on your short list!
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3.9.2015

Very impressed with these after deciding to give them a go after all the good reviews and having used Ansmann rechargeable batteries for several years. Nice touch to have them delivered pre-charged although I did a check on the 4 and found my Ansmann battery charger/checker giving 4 x different states of charge with 50/60/70 and 80% of capacity. A 2nd set came in at 60% x 2 and a 70 and 80%. OK, not all seem to have held the charge as advertised but all are more than usable the first time you unpack them. Even with this the key test for me is if they work with my Apple Mouse which seems to be a little fussy as to which batteries it will tolerate but the Eneloop's were fine and the mouse has been working without complaint since.All the batteries gave similar readings as to output and all slightly higher than the 1.2v. They charged fine in my Ansmann energy 8 Pro charger.Of note is the fact these are now 2500mAh batteries rather than the 2450! OK, a small difference but nice to see the continuing development.Overall, very pleased and have just received 2 x more packs of these through.
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15.9.2016

I got Logitech wireless keyboard K800 together with regular white re-chargeable eneloop batteries. Basically after one day of intense use with backlit keyboard set to level 3/4, batteries were empty and keyboard needed to be plugged in to provided USB cable. Charging lasts a few hours. It made it non-wireless anymore and defies purpose in a way. I got eneloop pro batteries now and charged them first with separate good charger. Now I am blown away. It is day 5 now, I am using keyboard with back-light turned on, on average 10 hours a day and the battery indicator shows me still 100% charge! The batteries do fantastic job and I have decided to spend a few minutes writing this review.Highly recommended if you need long-lasting steady power-up of less energy- consuming devices as compared to flash guns etc. The only downside is that I need to replace batteries with newly charged ones once in a while but is is really little job with so much advantage of having these batteries.If you need quality and performance this is the best money can buy in my opinion.
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29.11.2014

These eneloop rechargeable batteries are brilliant for equipment that you might not use everyday as they have a very very low self discharge - claim to still have 90% of charge after 1 yr of storage. They definitely keep their charge much better than a normal NiMH battery. I use them in my little Canon A570 camera so I can put in a fully charged set and be sure they are still good when I come to use the camera. Also useful that you can charge spare ones and leave them in the camera case and be sure they hold a good charge when you need them.You can buy special eneloop chargers but I find my normal NiMH one works just fine.They give a good voltage 1.47V a week after charging (ideal for Canon A570 which expects alkaline batteries and soon gives the low battery symbol on most rechargeables) and will give a good current of over 9.0A which is ideal for my battery powered glue gun and soldering iron.
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2.1.2015

These batteries are very long lasting. I use them in a few high drain devices and they have an almost un-naturally long life between cycles. An example is in my console controller - firstly they report correctly as fully charged (all 3 bars full) by the console as only alkaline disposable batteries usually manage. Usually all rechargable batteries i have tried incorrectly report partially charged as they are calibrated for the higher voltages of fresh disposable batteries. Then they just seem to keep going and going, i managed to play 3 big RPG games back to back that added up to a significant number of hours use and still no low battery indicator.Not sure how these have been developed but they seem to be years ahead of the competition. Well worth the higher price, and can handle 800 charges, as opposed to Duracells 500 charge rival.These are quite awesome.
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23.1.2015

I was a little dubious about these as they cost quite a bit more than other Eneloops, and these themselves are pricier than other pre-charged battery makes. Over the years I had become quite disenchanted with rechargeable batteries simply because they lost their charge in storage - the new pre-charged kinds (like the Eneloops) do not: they hold pretty much their full charge for as long as you are likely to store them in a drawer. This makes them as good in use as any other kind of non-rechargeable alkaline battery but a quick recharge (45 minutes on my charger) and these are as good as new.The 900mAh ones I bought just to see if they kept going longer than the "ordinary" white Eneloop.And they do - as I say, at a price. They seem to t take a little longer to recharge but not inordinately so.
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11.2.2020

I bought these over two years ago for a new camera I'd purchased, based on reviews that said they were about the best on offer for maintaining their charge when not in daily use. I have to say they've been outstanding, not only in their ability to hold charge when lying dormant in the camera, but also in general use. I take a lot of photos but often not with the same camera (I have three) and these batteries, when properly primed then charged, last literally months between charge. They need charging any day now but this is only the fourth or fifth time they've needed it and I've taken roughly 3,500 high def photos and 30 hours of video.I do tend to run them right down before recharging.....though I've just discovered that's not the best way to prolong battery life!
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28.8.2015

I've used these batteries in just about any device they fit for some years, including a number of radio mics, two Canon Speedlights, any number of kiddies toys, battery powered mice and keyboards, etc. I also use the AAA units in all of my TV remotes. They are consistently reliable, hold their charge (in all practicality) indefinitely when not in use and provide oodles of power when in use. Compared to rechargeable batteries of even 10 years ago, Eneloop are a completely different beast. I just wish they made/I could get hold of Eneloop C and D cells and PP3 units, as the other brands I'm forced to use in these sizes are always left wanting by comparison.These coupled with a Duracell 8 battery charger are a force to be reconnected with.
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26.1.2015

I had recently bought some energizer rechargeable batteries to replace the original ones in my Siemens C300 gigaset dect phone. The phone was struggling to keep any charge and would be flat within an hour out of the socket. After doing some research I read about the Sanyo Eneloop batteries( recently rebranded to Panasonic Enelopp, as panasonic own Sanyo) these are the only batteries made in Japan to the high standards you would expect. They did not disappoint. Once charged I have been able to leave my phone out of the charger for about three days without the batteries running flat. I personally think the Siemens phone eats batteries so probably not fair the energiser batteries,but the enelopp ones beat them into the ground.
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