Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4AA eneloop 2100 Cycle Rechargeable Batteries (4 pack)
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- 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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From the manufacturer
eneloop Ready to Use Rechargeable Battery
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(22.214.171.124). ***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 68 degrees F. Results may vary based on conditions of storage and use.
Ready to Use Ni-MH Rechargeable Batteries
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 -4 F****
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 –4°F.****
|Capacity||up to 2000mAh*||up to 800mAh*||up to 2550mAh*||up to 950mAh*|
|Cycles / Recharges||up to 2100**||up to 2100**||up to 500**||up to 500**|
|Storage Life||Hold 70% charge up to 10 years||Hold 70% charge up to 10 years||Holds 85% charge up to one year*||Holds 85% charge up to one year*|
|Low Temp Rating||Down to -4 degrees F||Down to -4 degrees F||Down to -4 degrees F||Down to -4 degrees F|
|Chemistry||LSD Ni-MH||LSD Ni-MH||LSD Ni-MH||LSD Ni-MH|
|Country of Origin||Batteries made in Japan Charger made in China Spacers made in China||Batteries made in Japan Charger made in China Spacers made in China||Batteries made in Japan Charger made in China||Batteries made in Japan Charger made in China|
Not only is throwing out spent batteries costly, it's wasteful. The Panasonic 4-Position Charger holds 2 - 4 NiMH batteries to help save you money by reusing batteries. This charger comes with four precharged eneloop AA batteries.
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I have been using eneloop batteries since the first-gen was introduced to the US market back in beginning of 2007. Over the past 7.5 years, I have tested 2nd-gen (1500 cycles), 3rd-gen (1800 cycles) and lately the 4th-gen (2100 cycles) eneloop cells. I have no complaints about the quality of eneloop cells. But I'm always unsatisfied with the charger bundled with most eneloop packages.
- The MQN05 (bundled with initial eneloop packages back in early 2007) can recharge individual cells. But it is only rated for 120V AC input. There is just one indicator light, which goes off when all cells are fully charged.
- The MQN06 (bundled with most eneloop cells sold between late 2007 and beginning of 2014) can only charge in pairs. I call it 'semi-smart' at best.
- The MQR06 (introduced to US market in 2012) is faster, handles individual cells and accepts 100-240V AC input. But it is a lot more expensive.
Previously, I often recommended using either Sony BCG34HLD or BCG34HRE to recharge eneloop cells, instead of bundled Sanyo eneloop chargers. Unfortunately, both chargers are now marked as "discontinued by manufacturer" on Amazon.
Finally, Panasonic (who purchased Sanyo back in 2009) released the new BQ-CC17 charger for eneloop cells. It offers the following advantages over previous value-priced chargers.
- Charges 1-4 cells individually.
- Individual battery status light for each cell.
- Accepts 100-240V AC voltage, good for use world-wide.
- More compact than the MQN06.
The advertised charging current is 300mA for AA, 150mA for AAA. That means it takes at least 7 hours to recharge a set of 2000mAh eneloop AA cells. (2000mAh/300mA = ~7 hr). I have verified this by charging two eneloop AA cells that are 50% depleted, together with two that are completed depleted. The charger took 3.5-4 hours to finish the first group, and 7-8 hours to finish the second.
The actual charging current I measured is pulsed between 0 and 1200mA at 25% duty cycle, which gives an average current of 300mA. This is better than charging with a fixed 300mA DC current, because the -dV/dt (negative delta voltage) detection can be done more reliably at 1200mA peak current.
Some other notes:
- Similar to the design of MQR06, the indicator lights are hidden underneath plastic case. They turn green when charging, and off when done.
- Even with a low charging current of 300mA, the batteries do get warm to the touch near the end of charging process. This is normal.
- The charger is made in China. The batteries are made in Japan.
Now for the 4th-generation eneloop cells: as far as I can tell, they are mechanically identical to the 3rd-gen and 2nd-gen eneloop cells. Electrically, I can see no performance difference between 4th-gen and all earlier generations of eneloop cells. Even their charge-retention rates are indistinguishable (I have tested some first-gen eneloop cells after 3.5 years in storage, and they still retain over 70% of original capacity). The only difference is in the advertised cycle life ratings. In real life, can anyone tell the difference between '2100' and '1800' cycles? (Please don't answer '300'!)
The new Panasonic BQ-CC17 is a real improvement over previous eneloop value chargers. It is worthwhile to get this package just for the charger. On the other hand, the new 4th-gen eneloop cells offer no measureable performance difference over earlier generations. I see no reasons to pay extra just for new wrappers.
If you are value-conscious, consider the AmazonBasics NiMH Pre-Charged Batteries in white wrappers. Those are just rebranded 2nd-gen eneloop cells based on my testing.
[Update on Aug 24, 2014]
- The more I use the BQ-CC17 the more I like it. In many cases some of my batteries were over-discharged to 0V and cannot be detected by advanced chargers such as La Crosse BC1000. But the BQ-CC17 has no problems recharging those.
- Amazon also sells the 'Advanced Charger Pro', often bundled with 'Eneloop Pro' High Capacity Batteries. The 'Pro' charger is the same BQ-CC17 in black. The 'Eneloop Pro' batteries are just repackaged Sanyo XX, with capacity rating bumped up from 2500 to 2550mAh.
[Update on Dec 22, 2015]
For additional information on eneloop batteries in general, please refer to my newly updated "Panasonic/Sanyo eneloop FAQ":
I purchased this product as a better alternative to the Sony CycleEnergy charger I purchased last Christmas at a B&M store in Germany for €29.99 (about $37 USD). The biggest disadvantage I had with the Sony CycleEnergy charger is that it required me to always charge batteries in pairs, which ended up becoming problematic after noticing that the batteries don't always charge equally. I would charge the batteries until the LED light would notify me that they are ready to use, yet after inserting them into my high-power devices the batteries would already read one to two bars lower instead of indicating all the bars for a full charge. At the time I also only owned two rechargable AAA batteries, one which was used for my wireless laptop mouse and the other for a Bluetooth stereo remote. This also turned out to be a problem since the wireless mouse would drain the battery very quickly whereas the battery in the remote would barely lose its charge, which in turn would force me to charge a near dead battery with an almost full battery.
It was at this point that I started looking into a better alternative for charging my rechargable batteries, and after a bit of research I came across the Panasonic BQ-CC17 "Advanced Individual Battery Charger". The reason I chose to go with this specific brand and charger was because it has excellent ratings, the great price, and most importantly allowed for individual cell charging.
I cannot express how pleased I am with this product, and I highly recommend this product without any hesitation to anyone in need of an excellent battery charger! The convenience factor alone of not having to charge batteries in pairs makes this product a well worth investment in my opinion. I am also shocked at how affordable this battery charger is compared to the Sony CycleEnergy I purchased, as I only paid ~$20 which included 4 AA batteries that sell for ~$14 if bought without the charger. I practically could have purchased two of these Panasonic chargers for the price that I paid for a single Sony CycleEnergy charger!
As far as my experience with the battery indicators on my high power devices, they finally indicate a full charge when inserting the batteries into the device! Which tells me the reason as to why it showed one to two bars less on my previous charger is because the charger was set on a timer and one of the two batteries must not have been getting fully charged during the process. The BQ-CC17 has also bee compatible with all my other NiMH rechargable batteries, which so far include my Sony CycleEnergy AA and AAA, Duracell AAA and AA StayCharged, and Energizer Recharge Plus AA.
Another plus for folks such as myself is that this charger works outside the U.S., as the packaging indicates 100-240V 50/60Hz making it world wide compatible as long as you buy a plug converter (can be found as cheap as $1, though I would recommend paying a few extra bucks for a better quality and safer product).
The only con I found with this product initially was in regards to the LED lights, not that there is any performance issue with the lights themselves, it was just impossible to even know they existed until you plug the charger in and charge a battery. When the item first arrived I was under the impression that I had received the wrong charger as I couldn't see any LED lights on the charger nor did I find any mention of them on the packaging. I had to go back to the product page on Amazon to ensure that I had purchased the right product and properly read the description to include LED indicators. It wasn't until I used the charger for the first time that I was able to spot the LED indicators, as they are hidden behind the white plastic case and near impossible to see without charging a battery. Overall I think it actually makes the charger look more aesthetically pleasing with the LED lights hidden behind the case, I just found that initially it created some confusion since some of the pictures on the product page show the little green lights which makes it seem like the lights are featured externally on the charger. Perhaps it was just me, but I figured I'd mention this just in case anyone else is a bit confused when they can't find the LED indicators as the thought of them being hidden behind the casing never even crossed my mind.
Another thing I want to mention in regards to these Chargers is that it appears the only difference between the BQ-CC17 and BQ-CC17 "Pro" is the color. According to the product information from each charger, everything else appears to be exactly the same. So unless you prefer a black charger over a white one I recommend that you don't get hung up on the extra wording of "Pro" and instead purchase the BQ-CC17 charger that comes with the 4 AA batteries as that's the best bargain.
My purchase was shipped by and sold from Amazon.com, which arrived in the retail packaging displayed in the picture of the product page and was fairly easy to open. The 4 AA batteries including in this pack came pre-charged and were ready to be used upon arrival. In my opinion this charger is the best in it's price class, I'll even go as far as saying better than all of the more expensive models I've bought in the past.
-Charges batteries individually which results in proper battery charge, unlike those chargers set on timers or requires charging in pairs.
-Great price, especially if you purchase the model that comes with 4 pre-charged AA batteries.
-Works worldwide (100-240V 50/60Hz) with additional purchase of plug adapter/converter
-LED lights are hidden underneath white casing, will only turn on when battery is being charged
In conclusion, this is the best rechargable battery charger I have ever used, I cannot recommend this product enough!
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..
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Why do i like it;
Each slot charges independently.Read more