Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries

(10 customer reviews)

Price: $17.99

  • Recharge up to 2100 times
  • Maintain up to 70% of their charge after 10 years (when not it use)
  • 2000mAh type, 1900mAh min, Ni-MH pre-charged rechargeable battery
  • 4 position charger with advanced, individual battery charging, AA and AAA cells
  • Battery detection technology – automatically shuts off when charging is complete

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Brand: Panasonic


Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries

Additional information


Product Dimensions

6 x 7 x 1 inches

Item Weight

7.2 ounces

Domestic Shipping

Item can be shipped within U.S.

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Item model number



4 AA batteries required. (included)

Is Discontinued By Manufacturer


Date First Available

April 8, 2014



Country of Origin


10 reviews for Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries

  1. R.Consumer

    Where It Wins Stars(+) Low self-discharge variety(+) Individual cell charger(+) Packaged charger accepts AC 100-240V input voltages(+) Functionally similar to alkaline batteriesWhere It (Almost) Loses Them(-) *Just slightly* thicker than alkaline batteries(-) Can take up to 7-8 hours to charge a drained eneloop to full capacityCaveats for International Customers(/) Although the charger can accept a wide range of input voltages, the integrated electrical plug on the unit I received is of the US-style 2-pin configuration. A physical pin adapter may be needed for overseas useOverall: Five stars. For all intents and purposes, the eneloops are the rechargeable equivalents of alkaline batteries.Note: This review is based on AA/AAA eneloops used in conjunction with the BQ-CC17 NiMH chargerI’m no electrical or chemical engineer, so I cannot provide a detailed analysis on the characteristics of a battery. This review will just be from the lens of an average consumer that uses AA/AAA batteries in his electronic devices.I’m new to rechargeable batteries. However, for a long time, it was a given fact that not only rechargeable batteries lose their maximum storage capacities rapidly after a few recharges, they are also unable to hold the electrical energy stored inside them for prolonged periods. These two facts alone are enough for me to hold off investing in rechargeable batteries in the past. Now, however, these  Panasonic Eneloops  seem to have overcome the technological challenges, hence making it viable for myself to try out rechargeable batteries on a daily basis for the first time.For reasons unknown to me, every electronic device I’ve owned that requires AA/AAA batteries officially states that they only accept 1.5V alkalines; the eneloops, on the other hand, are specified at 1.2V NiMH. However, I have yet to encounter a device of mine that refuses to accept the eneloops; game controllers, computer mice, calculators, flashlights et al all work as per normal with similar battery lifespans observed. Naturally, this may not hold true for all electronic devices out there.The eneloops also provide more information to the end-user, printing their min/typical electrical capacities on the wrapper. Whereas, alkaline batteries I’ve used reported only their expiry dates. That being said, being an average user, details of their electrical capacities are not immediately useful to me without further interpretation.However, the biggest advantage of rechargeables over alkalines is the removal of uncertainty in the remaining charge left. With the eneloops, I no longer have to second guess whether the batteries would last in later use; simply charge them to remove all traces of doubt. The eneloops’ low self-discharge capability and its ability to retain its maximum electrical storage capacity certainly help in this regard though I have really no means of verifying this fact objectively, though my everyday experience with the batteries has not suggested otherwise.The BQ-CC17 charger is able to charge 4 NiMH cells, AA or AAA, individually. This is without doubt, the best feature of the charger as most other models I’ve seen require pair charging minimum. However, there are two aspects about this charger that are less than ideal. First, the 4 individual LEDs are not aligned with the cell slot. Coupled with the fact that the LEDs are hidden until the slot is occupied and charging, it can be confusing to identify which cell has completed its charge cycle.Furthermore, I find it takes a tad too long to fully charge a drained eneloop, about 7-8 hours. Granted, I understand that this is just a basic charger without all the advanced functions expected in a dedicated unit. Still, I would have preferred it if the charging duration was shortened to 4-5 hours instead of taking almost all daylight.Finally, as an average user, I found the eneloops are a hair thicker than alkalines. Devices with extremely tight-fitting battery compartments may face an issue in this regard, but I have yet to encounter a device which cannot accept the dimensions of the eneloops. Other rechargeable battery brands I’ve come across in complimentary gifts also exhibit this behavior, so this issue is definitely not specific to the eneloops.For all intents and purposes, the  Panasonic Eneloops  are functionally similar to alkaline batteries in my everyday use despite different voltage specifications and battery chemistry. Having used the eneloops for a few months, it has thus far lived up to its claims of low self-discharge and high maximum capacity retention. Your mileage may vary, but I find the eneloops an economically viable alternative to alkaline batteries in high-drain electronic devices.

  2. Stormy926

    Yes you read that right, I bought these for my Xbox One controller 6 years ago and they are still solid, granted the battery life has degraded to maybe 85% capacity like any battery will after many years of use. These batteries have out performed all other brands I’ve used, but there is a caveat here.This is a note to all the negative reviews here, these eneloops are made to be used in devices that don’t need a lot of power like remotes, clocks and game controllers, they put out less power but the plus side is they last for up to 10 years! Can’t say the same for other brands like energizer. They are made this way on purpose, longer battery life and longevity for low power devices. If you need a stronger battery for things like flash lights and cameras with a flash GET THE ENELOOP PRO’S, these won’t last for 10 years but they will perform better, people need to pay attention to the description.The top 1 star review mentioned that the charger wouldn’t stay in place in the outlet and that it would sag down, that is your old worn out outlet NOT THE CHARGER! In my experience the eneloop charger is much lighter than other brands and doesn’t sag at all, just plug it into the top outlet and you’ll be fine.And other reviewers have had some quality control issues, this is very unfortunate, but bound to happen with maybe 1 in 1,000 (just a guess), if you get a dud, or a bad charger SEND IT BACK! or exchange it with Amazon, don’t crap on the thousands of 5 star reviews just because you had a bad experience.

  3. PhotoGraphics

    When I first heard about Sanyo’s new type of rechargeable batteries in 2005 I bought a set of them immediately together with the original charger. I still use those batteries on an everyday basis and though their ability to hold a charge has diminished a bit, they still work acceptably. At that time you had to charge all four batteries (and you couldn’t mix AA with AAA) and the charge time was roughly 3-4 hours.Since then Eneloop has undergone lots of changes as has the product itself. Specifically what those changes are depends on where in the world you live. If you live in the USA the product you buy that’s intended for the U.S. market is sold by Panasonic (one of the two owners now of the Eneloop trademark … Sanyo is out of the picture) and the batteries are, or should be, made in Japan with the chargers being made in China. This particular set makes a big point that recharging time for a full set of four is 7 hours; charging time used to be underplayed previously. The reason may be that there is another, harder to find and more expensive “advanced” charger that quotes a 3 hour recharge time. What they don’t make obvious is that if you are only charging 1 or 2 AA batteries the charge time for both chargers is identical … 3 hours. You benefit from the faster charger time with the new premium charger only if you are charging 4 batteries at the same time.As long-time Eneloop customers are probably aware, there are literally pages of batteries with the Eneloop brand name being sold. Some have been reported to be counterfeit. Some are made in Chinese factories and intended to be sold outside of the USA. Some may have the Fujitsu brand on them and some may be ancient (pre-2009) Sanyo batteries. Do NOT buy those … they are obsolete.This product checks out as legit and they were close to 100% pre-charged. As I discovered after getting 11+ years use out of my original set, the estimate of how many times they can be recharged is just that, only an estimate. Your useful life will vary depending on temperature and humidity conditions, what device you’re using them in, how far you deplete them before recharging them, which if the several models of chargers you recharge them in, etc.If you have never before owned Eneloop batteries, I recommend starting with this kit of four AA cells with charger. I consider it a 5-star product.

  4. diydiy

    these are expensive but a good long term know the good things about rechargeable things but here is what to worry about…#1. someone throwing them away on you.make sure your family does not throw them away thinking they are regular batteries.#2. make sure you have some on standby charged up, these take a long time to charge.#3. watch out, you will start to use batteries more and more! even Christmas decorations!side effect of an endless supply of batteries is you will buy more “toys” that use them and use them more, overall using more power. That seemed to be something that happened to us.we would not buy something that took batteries since they were expensive, now you we just buy the item and use it, thereby using MORE power possibly defeating any environmental benefits.something to keep in mind.

  5. Jr.

    I’m a photographer and have dozens of rechargeable AA’s of different brands (including Eneloop) for on-board Speedlights, flash triggers, remote flashgun, battery packs, etc. I’ve always had good experience with Eneloops and these 2100mAh can get me 300+ flash shots easily. However, as good as these Eneloops are I was mainly interested with the charger than the batteries themselves.Since my main AA chargers (12-slot and 4-slot) are both desk types and not exactly light, I wanted a 4-slot, portable and smart charger that can conveniently plug at any wall outlet. The Panasonic BQ-CC17 on this kit is exactly the type of charger I was looking for. It is a Smart type that charges batteries individually and can even detect a failing battery by flashing the front LED charging indicators. I bought this kit in 2016 and used it extensively for years in my home studio as a dedicated charger for my on-board Speedlight’s batteries. It has since graduated to the kitchen in early 2020 as a general purpose AA/AAA charger for my son’s video games, oculus quest controllers, wireless phones, flashlights, etc.. It is now January of 2021 and this Panasonic BC-CC17 charger still works perfectly as the day I bought it. Very highly recommended.P.S. The now 5 year-old Eneloops are still working but at lower capacity as expected. Maybe 100 or so low power flash shots?

  6. VJ

    Needed some new rechargeable AA cells. With the included charger this was a very good price on Amazon. Been using Eneloop cells for some time and they have proven to be dependable. There are plenty of “economy’ cells available out there, but anyone who has tried them know that they lose the ability to be fully charged in a time in proportion to their cost and then you seemingly are removing to recharge and replace them at ever-shortening intervals.The charger can be placed in the top or bottom of an outlet without blocking the unused outlet as the flip-out plug on the back of the charger is not polarized. It charges AA as well as AAA cells, and will charge 1, 2, 3, or 4 sells at a time. I left charged batteries in it overnight and they seemed to be at room temperature meaning that the charger does not overcharge them.The only negative at this point it that it would have been nice if there was a USB outlet on the charger to be able to charge another device.

  7. Fdo Shopper

    The Panasonic AA eneloops outlast AA Duracells. I use them in a power hungry Nikon that even when left unused for extended periods drains the batteries. Because I was tired of constantly having to buy new cells even when I wasn’t using the camera I decided to purchase the eneloop AA’s and charger. To my surprise the batteries didn’t drain after 3 months, and I was able to use the camera multiple times before having to recharge. The cell charger itself is a little slow but there is a benefit to the latter and that is the batteries get a fuller charge and they will last longer.

  8. G. Normalo

    UPDATE 20.09.2020. Stood the test of time. Awesome charger and batteries. No complaints at all of these Panasonic charger and Eneloop batteries. Buy with confidence but be aware of counterfeit products (mostly on eBay I suspect have seen lots of those counterfeits). The Eneloop brand and the amazon batteries I recommend. Charge all your batteries only with this Panasonic smart charger.I recommend these as the only option. These are the best. Panasonic all day long.MAIN REVIEW: Very good charger. I come from the older type timer based chargers. This is my first “smart” charger. A big improvement in battery temperature since they stay way cooler than in the older timer based Energizer or Rayovac chargers which seemingly shorten the battery life due to let them Charge to Long. But this Panasonic charger has one drawback: it refused to Charge an Energyzer 12 year old battery (NiMH rechargeable) since it blinks only green light. It does however Charge my other 12 year old Rayovac and Hybrid Rayovac batteries (NiMH rechargeable). They stay way cooler than they did on the timer based charger they came with 12 years ago. So These smart chargers are a big improvement but “built in obsolescence” seems to be the case as well since this one refused one of my Energizer batteries which perfectly was charged by it’s original timer based charger – and that particular battery holds well the Charge in my flashlight. However this battery gave signs of an Voltage drop on the light since it dimmed down which my other NiMH never did. So probably it does not hold anymore the propper Voltage although it worked fine in my flashlight.So, the more the smart charger refuses batteries, the more batteries factories will sell. Maybe I have to “jump Charge” it with my old tech chargers in order this Panasonic charger can deem it Sound again and charges it. So it works with other brands of NiMH rechargeable batteries but is prone to refuse to recognize/Charge batteries with a Little internal Problem.I recommend this charger and Eneloop batteries. Good value at 17$. Buy this one with Eneloop D cell Adapters so you can power up with just These AA batteries your D cell Equipment.I highly recommend despite it’s sensibility for worn/old/defective/overcharged batteries.UPDATE 24.09.2019: The defective Rayovac and Duracell batteries it first did not accept can be “jump charged” and they Charge then with this Panasonic charger. But the charger does not recognize -Delta Volt decline (it’s detection System when the battery is full) so it never shut off and the battery got very hot. Thus Panasonic charger should include as well an Temperatur safety shut off which it does not have. So the charger does not allways detects when the battery is full (-Delta Volt). If finally shut of on it’s own with These defective batteries (Duracell 2650 mAh) but the whole Thing was not normal. After charging the defective Duracell and Energizer batteries, I put them in the next day again into the Panasonic charger and it refused to Charge them. They are 12 years old new in box NiMH rechargeable batteries. It is probably not an good idea to jump start an battery which this charger refuses to Charge (blinking green light) since it can not detect the Voltage drop of the battery when it’s full to stop charging so the charger never stops charging or runs for straigth 14 hours. However These were unused 12 year old batteries which perfectly work in an timer based charger.

  9. d3viLm@n

    The batteries that come with this great charger states a minimum of 1900mA. After they are fully charged I took 2 out and install it on a cheap Philips electric shaver, turn it on, started a stopwatch and watched a 2hr movie. When the movie ending credits started rolling, the shaver was still going on, strong.Started another movie. By the time shaver stopped running, time clocked is 3 hrs 27mins.Also confirmed that it can charge a single battery anywhere on the 4 available slots. Put 2 in positions 1,3 or 2,4 still works. Screw those models that allow charging only in pairs – the designers think with the head w/o the brain.The green leds are “embedded” inside and only light up in green when charging. When charging is completed they really did turn off. So overnight charging is cool, no worries about overcharging and slow-kill the expensive batteries.No charging cable. At the rear you flip out a 2-pin plug that connects straight to the wall socket.(see my pix)I got another set of four AA’s and a pack of eight AAA’s. This is a must have kit when the gizmos you have run on batteries, esp radio controlled toys since they eat batteries for breakfast. I don’t have radio controlled toys, though..

  10. Nazo

    I originally used the rechargeable battery packs for my Xbox One controllers, which I would end up having to recharge after a very short amount of playtime. The OEM Xbox One battery pack from Microsoft (that comes with a USB charger cable and costs $30) provided roughly 8 hours of battery life. However, these Eneloop batteries lasted nearly 32 hours on a full charge and cost almost half as much as a single controller battery pack. I would highly recommend these if you want longer running time with your battery-powered devices.I have heard of Eneloop Pro, and those last even longer on a full charge but the number of times they can be recharged before they fully die is fewer, which is why I went with the regular pack.Basically, if you want batteries that can be recharged many times before they die (but still last fairly long on a single charge), get these. If you want batteries that keep your devices powered even longer on a single charge, then get the Eneloop Pro.I’ll update this review when my batteries fully die just to give better insight about how much longer you can actively use these.

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