---
product_id: 1365418
title: "Eneloop Panasonic BK-4MCCA4BA AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack"
brand: "eneloop"
price: "111 zł"
currency: PLN
in_stock: true
reviews_count: 13
category: "Eneloop"
url: https://www.desertcart.pl/products/1365418-eneloop-panasonic-bk-4mcca4ba-aaa-2100-cycle-ni-mh-pre
store_origin: PL
region: Poland
---

# 2100 recharge cycles solar pre-charged & ready works down to -4°F Eneloop Panasonic BK-4MCCA4BA AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack

**Brand:** eneloop
**Price:** 111 zł
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your hustle with Eneloop — batteries that outlast your to-do list!

## Quick Answers

- **What is this?** Eneloop Panasonic BK-4MCCA4BA AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack by eneloop
- **How much does it cost?** 111 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/1365418-eneloop-panasonic-bk-4mcca4ba-aaa-2100-cycle-ni-mh-pre)

## Best For

- eneloop enthusiasts

## Why This Product

- Trusted eneloop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly Ready:** Pre-charged using solar energy and holds 70% charge after 10 years—sustainability meets convenience.
- • **Unmatched Longevity:** Recharge up to 2100 times—power that keeps pace with your busy life.
- • **Extreme Condition Proof:** Reliable performance even in freezing temps down to -4°F—never let weather slow you down.
- • **Consistent High Capacity:** Delivers 800-850mAh for steady, dependable power across all your devices.
- • **Trusted Quality Assurance:** Made in Japan, packaged in the USA—premium craftsmanship you can count on.

## Overview

Panasonic Eneloop BK-4MCCA4BA AAA rechargeable batteries offer up to 2100 recharge cycles with a robust 800-850mAh capacity. Pre-charged via solar power and retaining 70% charge after 10 years, they deliver reliable, eco-conscious energy. Engineered for extreme temperatures down to -4°F and crafted in Japan, these batteries are perfect for high-drain devices like RC cars, flashlights, and wireless gadgets, ensuring long-lasting, consistent performance for the modern professional.

## Description

eneloop AA and AAA NiMH ready to use rechargeable batteries utilize Panasonic advanced rechargeable battery technology, allowing them to be recharged up to 2100 times. eneloop AA and AAA rechargeable batteries deliver consistent power performance, maintain 70% of their charge for up to 10 years, come pre-charged by solar power (at the factory) and are ready to use out of the package. These eneloop batteries also feature extreme temperature performance down to -4 degrees Fahrenheit. Pair eneloop and eneloop pro AA and AAA batteries with Panasonic advanced, quick advanced, or super quick advance eneloop chargers to maximize your rechargeable battery experience.

Review: Works great (when used appropriately), capacity as advertised. - [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.
Review: Best choice for RC cars! - Best choice for RC cars! After getting my son a basic remote control monster truck for his birthday and only having alkaline batteries in hand, I noticed that the litte truck wasn’t accelerating quickly and would stop at the smallest obstacle. After doing a little searching, online answers directed me towards these Panasonic Eneloop. I never would have thought of getting NiMH batteries again, assuming they were made obsolete by Li-ion (last time I remember recharging NiMH I was about 10 years old); well I was pleasantly proven wrong. These batteries come already charged which that’s new to me compared to other rechargeables I’ve bought in the past. Quality of the battery cases and overall look and feel of the batteries are very good; clean design, easy to recognize and appearing built to last. So how did they perform? WONDERFULLY. My son and I can actually have some fun with his simple entry-level RC, which is a relief, since I was worried it was just a weak car and that batteries wouldn’t make a difference. Well, I not only learned something new but I got a great product.

## Features

- 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 850mAh typical, 800mAh 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 4 eneloop AAA rechargeable batteries
- EXTREME TEMPERATURES: eneloop rechargeable batteries can used in extreme temperatures, down to -4 degrees Fahrenheit
- QUALITY YOU CAN TRUST: These eneloop rechargeable AAA batteries are made in Japan and packaged in the United States
- HUNDREDS OF HOUSEHOLD DEVICES: Perfect for use in hundreds of household devices, these eneloop AAA rechargeable batteries can be used in remote controls, flashlights, toys, wireless computer devices, rc cars, digital camera flash units, game controllers and more

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00JHKSMJK |
| Batteries | 4 AAA batteries required. |
| Best Sellers Rank | #3,835 in Health & Household ( See Top 100 in Health & Household ) #18 in AAA Batteries |
| Customer Reviews | 4.8 4.8 out of 5 stars (24,561) |
| Date First Available | April 11, 2014 |
| Department | Unisex-Adult |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.048 ounces |
| Item model number | BK-4MCCA4BA |
| Manufacturer | Panasonic |
| Product Dimensions | 0.44 x 3.38 x 4.25 inches |

## Product Details

- **Battery Capacity:** 800 Milliampere Hour (mAh)
- **Battery Cell Composition:** NiMH
- **Brand:** Eneloop
- **Number of Batteries:** 4 AAA batteries required.
- **Recommended Uses For Product:** remote flashlights, toys, digital camera flash units, game controllers and more

## Images

![Eneloop Panasonic BK-4MCCA4BA AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack - Image 1](https://m.media-amazon.com/images/I/71CkmYQWT5L.jpg)

## Questions & Answers

**Q: How long does it take to fully charge these aa batteries with my eastshine s2 charger?**
A: The charger claims it will charge them in 2 hours, right on the product description page. Maths tell us the S2 fast charger charges @1A per hour and the batteries hold 2A.      Protip, if you start answering a question with, "I don't know, but..." or, "I don't own one, but..." you have failed and most people ignore the rest of whatever you wrote.

**Q: Green Eneloop on NC-MQN06U charger, blinks green a couple of times then stops, no light. Battery charged no more than 100 times. Are they dead?**
A: Recommendations for eneloops and any rechargeable batteries. 1. Buy a good charger. 2. Don't quick charge, the extra heat will shorten the batteries life. 3. Replace them when they are low,  don't leave them draining with the power on in devices.  You will have two or three that won't charge without a paper clip jump (earlier post) . 4. Don't mix dead and charged batteries, the drained will be charged by the full ones the worst way to charge a battery.5. Dont mix newer generations of eneloops and older generations-it goes back to newer eneloops charging the older batteries. 6. Buy a good charger that monitors each battery throughout the charge!  Yes,  I said it twice.

**Q: can these batteries be used with cordless phones**
A: Yes.  That's what I am using them for and the packet specifically mentions dect cordless phones.  These batteries are almost identical to the original batteries that come with cordless phones that come with rechargeable AAA bateries except that these batteries have a much larger capacity (800mAh) letting them last longer between charges.

**Q: Do these batteries work on Panasonic cordless phone model KX-TG93 series?**
A: If the original batteries were NiMh then yes. If they were a different chemistry, such as nicad then it's not a good idea.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great (when used appropriately), capacity as advertised.
*by C***R on January 7, 2016*

[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.

### ⭐⭐⭐⭐⭐ Best choice for RC cars!
*by J***R on November 30, 2025*

Best choice for RC cars! After getting my son a basic remote control monster truck for his birthday and only having alkaline batteries in hand, I noticed that the litte truck wasn’t accelerating quickly and would stop at the smallest obstacle. After doing a little searching, online answers directed me towards these Panasonic Eneloop. I never would have thought of getting NiMH batteries again, assuming they were made obsolete by Li-ion (last time I remember recharging NiMH I was about 10 years old); well I was pleasantly proven wrong. These batteries come already charged which that’s new to me compared to other rechargeables I’ve bought in the past. Quality of the battery cases and overall look and feel of the batteries are very good; clean design, easy to recognize and appearing built to last. So how did they perform? WONDERFULLY. My son and I can actually have some fun with his simple entry-level RC, which is a relief, since I was worried it was just a weak car and that batteries wouldn’t make a difference. Well, I not only learned something new but I got a great product.

### ⭐⭐⭐⭐⭐ Worth the hype, would buy again if it wasn't still working lol.
*by K***U on September 8, 2025*

It definitely lives up to its reputation as the go-to or one of the best rechargeable batteries to buy on Amazon. Works well, lasts long enough, charges fine, and still working after months of extended using and recharging. 10/10

## Frequently Bought Together

- Eneloop Panasonic BK-4MCCA4BA AAA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack
- Eneloop Panasonic BK-3MCCA4BA AA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, 4-Battery Pack
- Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-15*