Panasonic BK-4MCCA8BA eneloop AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 8-Battery Pack : PANASONIC: �鶹��.ca: Health & Personal Care

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Panasonic BK-4MCCA8BA eneloop AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 8-Battery Pack

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Number of batteries	4 AA batteries required. (included)
Brand	Eneloop
Battery cell composition	NiMH
Battery capacity	800
Recommended uses for product	Camera, Toys, TV Remote, Gaming Controller, Radio, Flashlight, Mouse, Remote Control Vehicle, Wireless Keyboard, Phone See more

About this item

LONG LASTING PERFORMANCE: Recharge eneloop AAA rechargeable batteries up to 2100 times
POWERFUL NiMH RECHARGEABLE BATTERIES: eneloop AAA Ni-MH pre-charged rechargeable battery deliver up to 800mAh typical, 750mAh minimum
PRE-CHARGED AND READY TO USE: eneloop AAA rechargeable batteries are pre-charged at the factory using solar power and maintain up to 70% of their charge after 10 years (when not it use)
SECURE, PROTECTIVE PACKAGING: This package contains 8 eneloop AAA rechargeable batteries

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This item: Panasonic BK-4MCCA8BA eneloop AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 8-Battery Pack

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Panasonic BK-3MCCA8BA eneloop AA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 8 Pack

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Panasonic KKJ17MCA4BA Advanced Individual Cell Battery Charger with Eneloop AA New 2100 Cycle Rechargeable Batteries, 4-Pack, White

$44.98��($11.25/count)

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Technical Details

Department	‎Unisex-Adult
Manufacturer	‎eneloop
Place of Business	‎COLUMBUS, GA, 31907 US
Item model number	‎BK-4MCCA8BA
Product Dimensions	‎2.13 x 8.59 x 10.8 cm; 4.08 g
ASIN	‎B00JHKSMIG

Additional Information

�鶹�� Rank	#49,339 in Health & Personal Care (See Top 100 in Health & Personal Care) #157 in AA Batteries

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Product details

Batteries ‏ : ‎ 4 AA batteries required. (included)
Is discontinued by manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 2.13 x 8.59 x 10.8 cm; 4.08 g
Date First Available ‏ : ‎ April 13 2014
Manufacturer ‏ : ‎ eneloop
Place of Business ‏ : ‎ COLUMBUS, GA, 31907 US
ASIN ‏ : ‎ B00JHKSMIG
Item model number ‏ : ‎ BK-4MCCA8BA
Department ‏ : ‎ Unisex-Adult
�鶹�� Rank: #49,339 in Health & Personal Care (See Top 100 in Health & Personal Care)
- #157 in AA Batteries
Customer Reviews:
11,506 ratings

Product description

when Life Calls For Power, Depend On Panasonic. With More Than 70 Years Of Experience Developing Cutting Edge Products - And Creating The Right Batteries For Them - You Can Be Sure That Panasonic Batteries Are The Most Technologically Advanced In The Industry.

Top Brand: Eneloop

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From the manufacturer

Batteries can be recharged when fully, or partially drained.

*eneloop charge capacity and mAh estimates based on Panasonic internal IEC 61951-2(7.3.2) testing.

**Recharge cycles based on testing method established by IEC 61951-2(7.5.1.3).

***Solar energy charging as certified by The Green Energy Certification Center. eneloop batteries need a charger to be recharged. Panasonic Ni-MH battery chargers are recommended.

****Recommended storage conditions 20 degrees C. Results may vary based on conditions of storage and use.

eneloop

Ready to Use Ni-MH Rechargeable

eneloop Ni-MH 'Low Self Discharge' batteries utilize Panasonic’s advanced rechargeable cell technology allowing them to be recharged up to 2100 times.** These battery cells are ideal for all household products including flashlights, wireless gaming devices, digital camera flash units, and wireless mouse and keyboards.

Recharge up to 2100 times**
Maintain 70% charge for up to 10 years*
Up to 2000mAh* (AA) / 800mAh* (AAA)
Pre-charged using solar power***
Temperature performance down to -20 C****

eneloop 2100 cycle rechargeable Ni-MH batteries maintain 70% of their charge for up to 10 years (when not in use and stored properly).*

Improvements to the conductive surface layer of the active (positive) electrode material (made primarily from nickel-metal hydride) produce greater conductivity and durability. Limiting the degradation of the conductive layer increases the number of times that eneloop batteries can be recharged. ..up to 2100 times.**

eneloop’s unique 'Clean Energy Loop' initiative is a reality. All eneloop and eneloop pro batteries are pre-charged at the factory in Japan using power generated from solar energy.*** This process is certified twice a year by The Green Energy Certification Center.

Keep your tactical flashlights, walkie-talkie radios, battery powered lanterns, cameras and other devices powered in the winter. eneloop and eneloop pro batteries deliver exceptional performance at extreme low temperatures, down to –20°C.****


	Buying Options	Buying Options	Buying Options	Buying Options
Customer Reviews	—	—	—	—
Capacity	up to 2000mAh	up to 800mAh	up to 2550mAh	up tp 950mAH
Cycles/Recharges	up to 2100 times	up to 2100 times	up to 500 times	up to 500 times
Storage Life	Retains up to 70% charge up to 10 years	Retains up to 70% charge up to 10 years	Retains up to 85% charge up to one year	Retains up to 85% charge up to one year
Charged at the Factory using Solar Power	Yes	Yes	Yes	Yes
Low Temp. Rating	Down to -20 degrees C.	Down to -20 degrees C.	Down to -20 degrees C.	Down to -20 degrees C.
Chemistry	LSD Ni-MH	LSD Ni-MH	LSD Ni-MH	LSD Ni-MH
Recyclable	Yes	Yes	Yes	Yes
Country of Origin	Japan	Japan	Japan	Japan

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Customer reviews

11,506 global ratings

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Customers say

Customers like the battery life, quality, and performance of the product. They mention it's the best rechargeable batteries they ever had, the benchmark for low-self-discharge batteries, and they work great in their cordless phones.

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Battery life Quality Performance

126 customers mention "Battery life"115 positive11 negative

Customers are satisfied with the battery life of the product. They mention it's the best rechargeable batteries they ever had, the best NiMH batteries on the market, and the benchmark for low self-discharge batteries. Customers also say it's a great alternative to purchasing regular batteries.

"These are the best rechargeable batteries by far...." Read more

"Great batteries. We use them in our media gear remote controls, wireless mice, and other small gadgets...." Read more

"Long lasting and keep charge well when not used" Read more

"I used it for my TV remote control. Excellent batteries." Read more

45 customers mention "Quality"45 positive0 negative

Customers are satisfied with the quality of the battery. They mention it's an excellent manufacturer of electronic that they trust. Customers also say it's long-lasting and keeps charge well when not used.

"Great product! and very good service! Only one day shipping to my home! Will order more and suggest to my friend." Read more

"Good product but hight price" Read more

"...However, Panasonic is en excellent manufacturer of electronic that I trust." Read more

35 customers mention "Performance"31 positive4 negative

Customers are satisfied with the performance of the battery. They mention it works great, holds their charge, and is flawless.

"These work great and so much better for the environment. You also invest and save over time, the math is easy. Love them." Read more

"Work great. No issues after recharging" Read more

"Work as advertised and cheaper than Walmart!" Read more

"Flawless.... Longevity for holding charge to be detremined." Read more

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Top reviews from Canada

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P.D.
Incredible, long lasting batteries
Reviewed in Canada on January 22, 2025
Verified Purchase

These are incredible rechargeable batteries. I have a pair of headphones I have used regularly for 15 years now that use these batteries. I have only changed the batteries 2 or 3 times in those 15 years. They have never exploded. In those 15 years I would have used more numerous disposable batteries than I can imagine. This is definitely the cheaper, more convenient way to go not to mention more environmentally friendly.

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Helpful

Sascha
Best Batteries! Always check the 'Sold By' field
Reviewed in Canada on June 6, 2023
Verified Purchase
I'm a big fan of Eneloop batteries. The long shelf life doesn't just translate to usable batteries after a long time lying around, but also a longer battery life in general. I had several packs of Duracell which wouldn't hold a charge after 5 - 6 years of mixed storage and light use in remote controls; They saw maybe three to four dozen discharge cycles at most. Meanwhile some Eneloop AAs I bought back in College for my camera flash and mic are still going strong, and they are around twice that age.

This pack of AAAs was sold by 'MYBATTERYSUPPLIER', and you should always check who is selling them before you buy. In this case the listed quantity of batteries was correct, manufacturing date was reasonably recent (2 yrs ago on mine), and I used an online guide to verify the authenticity of the batteries. Most of the negative reviews you see on �鶹�� are people saying they got fakes, so just make sure you check the seller's sign-up-date and ratings, and you should be fine.

One final word of wisdom, mAh is used as a marketing term. It's tempting to get the highest value you can find, but there can be a few flaws to that logic. Firstly, manufacturers may use different testing methods, as well as cell qualities. While I'd feel confident getting X mAh from a known brand like Duracell or Energizer, it's common for cheap batteries to list inflated values. The second thing to consider is self discharge rate. Not only are low self discharge batteries likely to 'live' longer, but a standard NiMH battery can lose up to around a quarter of it's maximum charge in the first 24h after charging, just sitting around. So unless you are charging that shiny 2500+ mAh battery and draining it immediately, you can actually be getting less capacity than a low-self-discharge cell. This is less of an issue with know brands, but unless you use the battery soon after charging, you will still get less capacity than you might expect.

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14 people found this helpful

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Hazleigh
Long lasting and hold charge well
Reviewed in Canada on August 4, 2024
Verified Purchase
Got tired of the usual batteries which either had lost their charge or did not last long. To be more ecological, I was looking for rechargeable batteries that had to last and hold charge well. After a lot of research, I finally found these Panasonic Eneloop rechargeable batteries. I first bought the combo-pack that consisted of charger and 4 batteries. I've used the charger and batteries for over 3 years now and love not having to buy one-time use batteries! Buying additional batteries to use for multiple devices. I highly recommend this brand of batteries.

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Darlene
Keep your phone and buy the batteries
Reviewed in Canada on July 25, 2025
Verified Purchase
Phones are not made like they used to be and I’m holding onto the Panasonic I bought 20+ years ago. These batteries enable me to do that and they’re a fraction of the cost of a new phone. With the Panasonic name on them, I trust the quality and the size. They let you match battery to phone model easily so there are no mismatches. The batteries last for years. (This was a repeat of a purchase from many years ago.) Highly recommend you buy this battery set and not a new phone.

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Hovant
Years of reliable service
Reviewed in Canada on April 27, 2025
Verified Purchase
I never could have thought that batteries would be an investment, yet here we are

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DynamikeB
Solid product and so far, way better than cheaper options. They deliver...
Reviewed in Canada on March 26, 2016
Verified Purchase
Working great so far. You feel quality and they indeed keep charge efficiently.

I use this in remote controls and kids toys and so far so good.

Recommended vs most of the cheaper rechargeable batteries.

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Vitali
Long lasting charge, long life with large number of recharges
Reviewed in Canada on January 1, 2023
Verified Purchase
Highly recommend these batteries. These are based on Ni-MH technology that provides a very large number of recharge cycles (we still have batteries in operation bought many years ago). This is a true sustainability (as compared to single use throw away ones). To be objective, a few in AAA size went bad over the years and needed to be replaced but it's still a good product. (By the way, we also use AA batteries and those are even more reliable).

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alex damico
Excellent product, and provider.
Reviewed in Canada on August 25, 2024
Verified Purchase
Best rechrageable batteries out there!
Not reccomended for Blink Cameras,

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Top reviews from other countries

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OMAR RENE DIAZ GARIBAY
buen producto
Reviewed in Mexico on June 12, 2025
Verified Purchase

excelente marca

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Chetan M.P.
Four Stars
Reviewed in India on August 17, 2016
Verified Purchase
Good batteries. still using on the factory charge and not drained out.

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Deepak Bhatia
Product shipped is an older generation, not as per picture and description
Reviewed in India on February 14, 2018
Verified Purchase
The product shipped is an older model BK-4MCCE/4BN and not BK-4MCCA8BA as shown.
The older model holds charge for 5yrs vs 10yrs in the newer model. It is unfortunate that this practice continues despite being reported earlier.

Read more
Salvatory Madrigal
Calidad
Reviewed in Mexico on November 22, 2024
Verified Purchase
Vengo de unas pilas chafas steren que ya no retenían carga y estaban prácticamente nuevas.

Con estas se siente la calidad, hasta son un poco más pesadas y según la caja vienen precargadas. Espero sean más duraderas

Muy contento con el producto

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Customer
Works great (when used appropriately), capacity as advertised.
Reviewed in the United States on January 7, 2016
Verified Purchase
[this review is for the AAA 8 pack, although much of the information applies to other Eneloops.]

The batteries arrived packaged on a card as shown in the photo on this page. I confirmed these are the latest 4th generation Eneloop batteries as advertised. The date of manufacture is imprinted on every battery, and although difficult to see, I found this set was made 5 months prior to receipt.

With any low self discharge battery (LSD NiMH), one should perform an initial and periodic "conditioning" comprised of charging and discharging the cell 3-5 times in a charger that has this function (sometimes called "refresh") in order for the cells reach their maximum energy storage capacity. After conditioning the AAA batteries, all 8 exceeded 750mAh capacity (the advertised minimum), with values ranging from 762mAh to 778mAh. The very narrow range is an indicator of high quality and consistency in the manufacturing process.

What follows are general recommendations to get the most from Eneloop and other LSD NiMH rechargeables....
Get a good quality charger if you use Eneloops or other LSD NiMH batteries. Cheap chargers will significantly shorten the life of these high quality and somewhat expensive rechargeable batteries. The charger must be a microprocessor controlled "smart" charger that chargers each battery individually, not in pairs. I use a Titanium "smart fast" charger when bulk charging many batteries, and a Opus BT-C2000 when trying to get accurate measurements on capacity and internal resistance. These are there several others good quality chargers out there so be sure to read reviews from people who understand and discuss the technical aspects of battery chargers. That 15 year old old battery charger you have that came packaged along with some long since thrown away rechargeable batteries should not be used.

Not all devices are designed to work with rechargeable batteries. The nominal voltage of rechargable NiMH batteries, 1.2 volts, is less than the alkaline equivalent at 1.5 volts. Some devices work well with either one and some are only designed for the higher voltage alkaline. This not a problem with the battery, it is a problem with the way the device is designed. Unfortunately it's rare for a device manufacturer to mention how (or if) it works with rechargeable batteries so you will have to test it or read the experiences of others.

Devices that display the amount of power left in a battery will be inaccurate when using rechargeables and tend to indicate the batteries have less power than they really do. A device may show 2 out of 4 bars, when in fact the Eneloop might really be at 85% of charge.

Rechargeable batteries like Eneloops (LSD NiMH), store 20-35% less energy than a good quality alkaline of the same size. This is not a "problem" with the rechargeable battery, it is a characteristic of the chemistry and how the energy is stored. That means you can not expect them to last as long between charges as an alkaline before replacement in most applications. LSD NiMH batteries however do hold more energy and last longer than carbon zinc batteries aka "heavy duty" (these are the really cheap batteries you may see at the dollar store or come prepackaged with low end flashlights).

Rechargeable batteries should not be *over* discharged as it will damage them. Unfortunately it's hard to tell exactly when the ideal time is to recharge so it's better to stay on the safe side and recharge early when device performance starts degrading and not wait until it's completely dead. The best way to tell for certain is to test with a battery tester that measures voltage under load and recharge when the battery gets to about 1.1 volts Even some cheap battery testers can do this (look for BT-168D) or for a more expensive one the ZTS mini 9R. If all you have is a voltmeter, recharge when the open circuit voltage at rest is about 1.22v.

Rechargeable batteries should not be charged too quickly as the internal heat build up will damage them. For AAA NiMH, it should take 2-5 hours to charge fully depleted batteries. If your charger goes from empty to full in 30 minutes, it is either damaging or under charging the batteries.

Devices that automatically charge the batteries, such as cordless phones or cheap solar lights, are not a good candidate for Eneloops. These devices use "dumb" charging circuits and will likely overcharge the batteries shortening their life. For these types of batteries you are better off with cheap NiMH batteries that are not marketed as low self discharge (LSD).

Devices that use a very small amount of constant power, such as a battery powered clock, might be better off with an alkaline. An alkaline may only need to be replaced every 3 years in such applications, where as the rechargeable may need charging in less than a year due to higher self discharge rate and lower nominal voltage. You will need to test it to be sure and decide what makes the most sense.

Infrequently used low power devices such as a TV remote in a spare bedroom are usually better off with alkalines. A high quality alkaline may last 5 or more years, and the cost/benefit of an LSD NiMH just isn't there. Be cautious of low quality batteries this these sorts of applications as the battery may leak after a couple of years.

Eneloops (and LSD NiMH in general) are better than alkalines in high current applications. An Eneloop can move energy faster to the device than an alkaline. Examples where LSD NiMh out perform alkalines are modern photographic flashes, remote controlled cars/planes, certain high output flashlights.

Marking your batteries is a good idea, especially with you have many purchased at different times that all look the same. I mark mine by putting the year/month I purchased them, followed by a unique letter. When I first get them, I test their capacity and log it for future comparison. Even if you don't have the equipment to perform extensive testing, just knowing when you purchased each battery can be helpful down the road.

Properly managed, high quality LSD NiMH batteries like Eneloops will give a long life. Abused, they will not do any better than cheap NiMH batteries. Most of the complaints and bad reviews are from people who do not understand the limitations, use them in the wrong application, or who do not properly charge them. Correctly using rechargeable batteries takes some work and isn't for everyone, but if you can deal with their idiosyncrasies, they can save a lot of money in the long run.

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