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Panasonic BK-3HCCA4BA eneloop pro AA High Capacity Ni-MH Pre-Charged Rechargeable Batteries, 4 Pack
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- 2550mAh type, 2450mAh min, Ni-MH High Capacity pre-charged rechargeable battery
- Recharge up to 500 times
- Maintain 85% of their charge up to 1 year (when not in use)
- No memory effect - batteries can be recharged when fully, or partially discharged
- Work in extreme temperatures down to -4 DegreeF
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From the manufacturer
eneloop pro High Capacity 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(184.108.40.206). ***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.
High Capacity Ni-MH Rechargeable Batteries
eneloop pro High Capacity Ni-MH 'Low Self Discharge' batteries utilize Panasonic’s advanced rechargeable technology which delivers increased power capacity for high power consumption devices. These battery cells are ideal for products like Digital Camera (DSLR) flash units, remote control toys, and tactical flashlights.
- High power capacity. ..up to 2550mAh* (AA batteries) / 950mAh* (AAA)
- Recharge up to 500 times**
- Maintain 85% charge for up to one year*
- Pre-charged using solar power***
- Temperature performance down to -4 F****
eneloop pro High Capacity Ni-MH 'Low Self Discharge' batteries utilize Panasonic’s advanced rechargeable cell technology which delivers increased power capacity for high power consumption devices. These battery cells are ideal for products like digital camera (DSLR) flash units, remote control toys, and tactical flashlights.
eneloop batteries utilize a highly-durable super lattice alloy which prolongs the life of this important material. Improvements to this super-lattice alloy have increased hydrogen stability resulting in reduced self-discharge and long lasting, stable voltage output.
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 degree Fahrenheit.****
|Capacity||up to 2000mAh*||up to 800mAh*||up to 2550mAh*||up to 950mAh*|
|Cycles/Recharges||up to 2100 times**||up to 2100 times**||up to 500 times**||up to 500 times**|
|Storage Life||Holds 70% charge up to 10 years*||Holds 70% charge up to 10 years*||Holds 85% charge up to one year*||Holds 85% charge up to one year*|
|Charged at the Factory using Solar Power||Yes||Yes||Yes||Yes|
|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||Made in Japan||Made in Japan||Made in Japan||Made in Japan|
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Battery Cell Type||NiMh||NiMh||NiMh||NiMh||NiMh|
|Item Dimensions||3.38 x 1.2 x 4.25 in||3.38 x 1.2 x 4.25 in||2 x 4.57 x 0.57 in||1.99 x 4.6 x 0.57 in||5 x 6 x 4 in|
|Size||4-Pack||8-Pack||AA 8 Pack||AA 8 Pack||AA|
The eneloop pro High Capacity Ni-MH “Low Self Discharge” batteries utilize Panasonic's advanced rechargeable battery technology providing up to 2550mAh (AA batteries) / 950mAh (AAA) of power and the ability to be recharged up to 500 times. eneloop pro battery cells deliver consistent power performance, maintain 85% of their charge for up to one year, come pre-charged by solar power (at the factory) and are ready to use out of the package. These eneloop cells also have increased power, added storage life and extreme temperature performance down to -4 degrees Fahrenheit.
Panasonic eneloop pro High Capacity Ni-MH “Low Self Discharge” rechargeable batteries, BK-3HCCA4BA. Package contains 4 (AA) eneloop pro cells which deliver increased power capacity for high power consumption devices. These battery cells are ideal for products like digital camera (DSLR) flash units, remote control toys, and tactical flashlights.
Top customer reviews
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I have been using eneloop low-self-discharge NiMH batteries since beginning of 2007, and I'm completely satisfied with them. One thing I noticed is that newcomers to the rechargeable battery arena often have similar questions/confusions about eneloop. So here is my list of eneloop Frequently Asked Questions. This list is work in progress.
[Q1] Why are there so many eneloop batteries with different capacity ratings and cycle-life numbers?
[A] There are actually three families of eneloop batteries:
- Standard version: The original Sanyo eneloop (circa 2006) was rated for capacity of 2000mAh typical for AA (800mAh for AAA) and 1000-cycle lifespan. Subsequent generations advertise longer lifespan (1500/1800/2100-cycles) at the same capacity. The charge retention rates have steadily extended from "85% after 1 year" to "90% after 1 year; 70% after 5 years"
(Refer to my uploaded photo on how to identify different generations of eneloop cells)
- High-Capacity version: The original Sanyo XX (circa 2010) was rated for 2500mAh but only 500 cycles. The charge-retention rate is slightly poorer at "75% after 1 year". Newer Panasonic eneloop PRO bumped the capacity to 2550mAh and charge-retention rate to "85% after 1 year".
- LITE version: Those have half the capacity of standard eneloop but twice the cycle life. They are not marketed in the US.
[Q2] Do I get better performance from the latest generation Panasonic eneloop cells verses earlier generation Sanyo eneloop cells?
[A] On paper, newer generation offers longer cycle life and lower self-discharge rate. In practice, however, you’ll see no difference since they all have the same capacity. The difference in charge retention rate and cycle life may become noticeable after ~10 year, if at all.
[Q3] Is there any physical difference between PRO and standard version of eneloop cells?
[A] The PRO cells are slightly thicker, with diameter of ~14.4mm (verses ~14.1mm). So they may not fit if your appliance’s battery compartment is too tight-fitting.
[Q4] What is the difference between 'Pre-Charged', 'Hybrid', 'Stay-Charged', 'Active Charged', 'Ready to Use' and 'Ready to Go'?
[A] Those are all marketing terms for Low-Self-Discharge (LSD) NiMH batteries. Sanyo first used the term 'Pre-Charged' for Sanyo eneloop back in 2006. The latest Panasonic eneloop says “Ready to use” on each cell.
[Q5] I see a lot of other brands of rechargeable batteries advertised as Pre-Charged. Are they just as good Panasonic eneloop?
[A] In general, NO. Sanyo/Panasonic eneloop is still the best in terms of charge retention rate and cycle life. Many lesser-known brand also claim to have low self discharge rate and high cycle life just like eneloop. But based on my testing, none actually delivers.
[Q6] What about the AmazonBasics Pre-Charged Rechargeable Batteries?
[A] To clarify, there are three different versions of AmazonBasic rechargeable NiMH batteries:
- The original AmazonBasics AA NiMH Pre-Charged Rechargeable Batteries came in black wrappers. They are made in China and have the capacity rating of 2000mAh. They are NOT as good as Sanyo eneloop batteries.
- The second version of AmazonBasics Pre-Charged Rechargeable Batteries came in white wrappers. They are made in Japan and also have the capacity rating of 2000mAh. They appear to be rebranded 2nd-gen eneloop.
- The third version is also black but called AmazonBasics High-Capacity Pre-Charged Rechargeable Batteries. They appear to be rebranded eneloop PRO. They are rated 2400mAh, but actual capacity is around 2550mAh.
[Q7] How do the Duracell Ion Core pre-charged Batteries compare to eneloop or AmazonBasics cells?
[A] The Duracell 'ion core' AA cells appear to be rebranded eneloop PRO AA cells, while the Duracell AAA cells are most likely rebranded 2nd-gen eneloop AAA.
[Q8] My Panasonic eneloop AA batteries say '1900mAh' on them. Are they counterfeits?
[A] All standard eneloop AA cells (from original to 4th gen) are rated "Typical 2000mAh, Minimum 1900mAh". The confusing part is that 2nd-to 4th-gen eneloop AA cell have "min.1900 mAh" printed on it, even though the actual measured capacity is typically over 2000mAh.
For AAA cells: Standard eneloop are rated "Typ 800mAh, Min 750mAh".
[Q9] How do I find out the manufacture date of my new eneloop cells?
[A] Each eneloop cell has a date code embossed on it. Shine a strong flashlight from the side and slowly rotate the cell to find it. Date codes are in the form of YY-MM. For example, if it says '12-08' that means Aug 2012.
[Q10] Date codes on my new eneloop cells indicate they are made in 2012. Should I return then for newer batteries?
[A] Relax! Unlike ordinary NiMH cells, Sanyo eneloop are still perfectly good even after 10 years in storage. Once you recharge them, they will return to 100% capacity again.
[Q11] I just received some new eneloop batteries. Do I need to recharge them before use?
[A] You can use them right out of the package. However, standard eneloop cells are only charge up to ~75% when they left factory (High-capacity version usually just ~50%), So you can use a Smart charger to 'top-off' their charges. Do NOT do this with a Dumb charger because it will badly over-charge them.
[Q12] I thought I have to drain my batteries completely before recharging them?
[A] This is only necessary if you are using a timer-based dumb charger. With a smart charger, you can top-off your batteries anytime.
[Q13] Can I use other brands of chargers to recharge Sanyo eneloop batteries?
[A] Sanyo eneloop batteries can be recharged using any good-quality Smart charger designed for NiMH cells. But for longer battery lifespan, avoid ultra-fast (15- or 30-minute) chargers and Dumb (overnight) slow chargers
[Q14] What is the difference between 'Smart' and 'Dumb' chargers?
[A] A Smart charger monitors the voltage profile of each cell individually during charging, and stops when a charge-termination signal (negative delta-Voltage) is detected. This is the only way to avoid over-charging. A Dumb charge relies on safety timer to stop charging, or has no termination mechanism at all. This usually results in over-charging which is bad for battery lifespan.
[Q15] How good is the Sanyo MQN06 charger bundled with most older eneloop packages?
[A] The MQN06 is semi-smart but has two issues: it charges in pairs (monitors the combined voltage of two cells), and the charging current is only 300mA. That means it take about 7 hour to recharge a pair of eneloop AA cells. A better choice is the Panasonic BQ-CC17 which charges each cell individually (but still at the same 300mA current)
[Note: Charge time (hour) = Capacity (mAh) / Current (mA) ]
[Q16] What is the best charging speed for eneloop cells?
[A] Choose a charger that gives you charge time between 2-5 hours. That means charging current of 400-1000mA for AA, 200-500mA for AAA..
[Q17] Isn't it true the best charging speed for NiMH and LSD-NiMH battery is the slowest?
[A] That’s only true when using a dumb charger which blindly charges for 12-15 hours, so the current has to be below 0.1C (200mA for a 2000mAh cell) to avoid over-heating. For a smart charger, the current needs to be at least 0.2C to ensure proper termination. If the charging current is too low, the negative delta-V detection may not work reliably. (The BQ-CC17 is an exception since it uses pulsed current)
[Q18] I always keep a set of ordinary NiMH batteries in the charger to keep them freshly charged. So why do I need low-self-discharge batteries?
[A] You don't need to do that with LSD cells. Just charge up a spare set ahead of time and keep them in your drawer. Swap them in whenever needed, just as how you use disposable cells.
[Q19] Why should I buy those 2000mAh eneloop instead of regular NiMH batteries that are rated 2700mAh or higher?
[A] All rechargeable NiMH AA cells rated 2700mAh or higher are susceptible to rapid-self-discharge problem. Beware of off-brand batteries that claim '3000mAh' or higher. Most of them can't even deliver 2000mAh.
[Q20] Can I use eneloop in places with extremely hot or cold weather?
[A] As a rule of thumb, every 10 degree C rise in temperature causes the battery's self-discharge rate to double. So although your eneloop cells can still function correctly, their shelf life will be reduced at high ambient temperature.
For cold weather it is not a problem, since eneloop cells are rated down to -20 degree C.
[Q21] Should I store unused eneloop batteries in the refrigerator to extend their shelf life?
[A] For ordinary NiMH cells, storing them in lower temperature greatly reduces their self-discharge rate so you can get longer shelf life. For eneloop cells it is not worth the trouble, because they can be stored for years at room temperature.
[Q22] Can I use eneloop batteries in cordless phones?
[A] Yes - as long as your phones (such as Panasonic DECT 6.0 cordless phones) are using individual AAA cells, instead of battery packs with special connectors.
[Q23] Do rechargeable batteries only go bad after they meet the number of charging cycles, or their lifespan is limited by time also?
[A] Capacity of a NiMH cell gradually deteriorates with number of discharge cycles. The 'lifespan' claimed by manufacturer is the number of deep-discharge cycles before capacity drops to 50%. This is done under tightly controlled test conditions, so in real life your result may vary.
[Q24] When rechargeable batteries go bad, do they also spill chemicals (like alkaline cells) or just won't hold a charge?
[A] Good-quality NiMH cells do not spill electrolyte as they gradually deteriorate. The only chance this can happen is when they are (a) severely over-charged at a high current, (b) severely over-discharged, or (c) exposed to extreme heat.
[Q25] My baby swing calls for 4 D sized batteries. Do eneloop D spacers work well?
[A] You can use those in a pinch, but expect to replace/recharge your AA cells a lot more frequently than before. This is because the energy stored in an alkaline D cell is about 7-10 times greater than that in eneloop AA cell. See my following review for other options: Panasonic BQ-BS1E4SA Eneloop D Size Spaces
[Q26] My La Crosse BC-700 Battery Charger reports some eneloop batteries as 'null'. Are they defective?
[A] If a battery is over-discharged and its voltage drops below 0.5V, the La Crosse charger cannot detect it and so the display says 'null'. Charge your 'null' battery in a dumb charger for a few minutes, then the La Crosse charger will recognize it.
[Q27] Is the La Crosse BC-700 better than the Panasonic BQ-CC17?
[A] Each has its advantages. The BQ-CC17 is inexpensive, simple to use, and works great for daily charging.
The BC-700 is an Advanced charger. It allows you to determine the true capacity (mAh) of all your batteries, and to revive those under-performing cells. Then you can group cells with similar capacities together for best result. See my "BC-700 FAQ" for details:
[Q28] Panasonic introduced a new charger, the BQ-CC55. Is it worth paying extra over the old BQ-CC17?
[A] Yes, for two main reasons:
(1) Shorter charge time: since its average charging current is 1.4A for 1-2 AA cells, 0.7A for 3-4 cells.
(2) Color-changing LEDs to show the status of each cell: Red=empty, Yellow=half-full, Green=full.
See my review on it for details: https://www.amazon.com/review/R217YKQZZRIRTW/
BACKGROUND & WHAT USAGE THE ENELOOP PRO IS INTENDED FOR
Eneloop is considered by many to be the tour-de-force of rechargeable NiMH cells (much like Panasonic is with lithium ion cells.) Gone are the days where NiMH cells did not give performance that came even close to alkaline. Things like memory, low service lives, rapidly fading capacity, etc. are over. Today we have NiMH cells that can dramatically outperform the finest of disposable alkaline batteries and can be charged thousands of times. Over a 10+ year period, you can save thousands of dollars with a good NiMH setup.
The eneloop Pro is eneloop’s (formally Sanyo and now Panasonic) follow-up to their highly successful eneloop XX series. Like the XX, the eneloop Pro is a SPECIALTY battery. It is NOT intended for usage with lower drain applications, and performs poorly when used for this purpose. However, when used in high-drain applications that tend to be brutal on the battery, the eneloop Pro gives unparalleled runtime that no alkaline can come even close to.
THE STANDARD ENELOOP 2100 VS THE ENELOOP PRO: Which is right for you?
Eneloop’s newest innovation is 4th generation NiMH cells. Like previous generations, eneloop is offering a standard-use and a high-drain model. These eneloop Pros use 4th gen technology, as do the standard eneloop “2100”. This fourth gen technology gives both batteries a very wide operating temp range, improved stability in output, slower self-discharge, and increases in durability.
Eneloop Pro SPECS:
-Capacity: 2550 mAh
-Service Life: up to 500 recharge cycles
-Rate of self-discharge: about 85% capacity remaining at 1 year of storage
Eneloop 2100 SPECS:
-Capacity: 2000 mAh
-Service Life: up to 2100 recharge cycles
-Rate of self-discharge: Over 70% capacity remaining at 5 years of storage
-A substantial performance improvement with high-drain devices vs. the third gen
THE 2100 --- The standard eneloop 2100 is designed to be a high-capacity battery that is capable of handling all but the worst of high drain devices. This battery makes substantial improvements over the third generation when it comes to handling higher-drain devices. It is ultra-low discharge (literally now it discharges SLOWER than many disposable batteries!) and high capacity at about 2000 mAh. This battery works great in both low drain and high drain apps. Additionally, with a cycle life of 2,100, this battery has serious longevity (literally the service life is four times that of the XX or Pro.) Because of this, most household devices should use this standard eneloop 2100. While it has a lower capacity than the eneloop Pro, the slower self-discharge and the ability to work better with low-drain devices will give better performance than the Pro with most devices. So if you are not using a device in which you constantly have to switch batteries out, the 2100 is what you want. The picture I uploaded shows a basic remote and Logitech wireless mouse; those devices get the best performance from the 2100s because they are not high-drain devices and so I use them exclusively in those devices.
THE PRO --- However, there are some devices that are just plain brutal on batteries. These will benefit greatly from the Pro (or XX) design. For example, in my picture you can see a Fenix LED flashlight and a wireless gaming mouse. These devices put a world of hurt on batteries and run times are measured in hours. The eneloop Pro makes substantial improvements over the already outstanding 2100 in this sort of application. Cameras, audio players, high-output flashlights, medical devices, lasers, etc. will benefit here.
So which battery you need completely depends on your application. I own 4 XXs and 4 Pros to go along with about 20+ 2100s. I use my 2100s for standard applications, and the XX or Pro for high-drain devices.
WHAT I LIKE
Like eneloops of the past, one thing that makes the brand unique is their advertising. Many battery makers advertise their batteries as having a MUCH higher capacity than they actually do. For example, I purchased 2500 mAh Tenergy batteries and brand new they only had a capacity of about 1700 mAh, and then rapidly shrank from there. I have had similar experiences with both Duracell and Energizer rechargeable cells. Eneloop guarantees each and every battery will meet their minimum mAh rating, and as a general rule all batteries exceed these ratings by a substantial margin. With these Pros, I purchased a 2550 mAh battery and I got a 2550 mAh battery. Additionally, eneloops do not rapidly shrink in capacity like other brands. Fives years or ten years down the line, these batteries will still work great if cared for. This longevity makes eneloop a much better value than inferior NiMH cells: spend a few extra bucks on eneloop today and enjoy their superior performance for years to come while simultaneously saving money.
Eneloop also sends their batteries pre-charged (and they were charged by solar energy.) With the low self-discharge of the Pro, and the extremely low self-discharge of the 2100, you can use these batteries immediately after purchasing them.
While the third generation batteries did a great job with colder temperatures, these 4th generation 2100s and Pros are outstanding. If you want to keep a flashlight in your car, these batteries are hard to beat given they work well in both hot-hot and cold-cold, and temperature extremes will not wreck your service life.
CONCLUSION: WHAT I LIKE THE MOST
Ultimately, there are two things I like about this battery the most. One, I save a ton of money over disposable batteries. I am talking thousands of dollars while simultaneously supporting environmentally friendly technology. Two, I get better performance from these eneloops and can use my devices longer. As of mid-2015, this is really THE battery to have for your high-drain devices (and the eneloop 2100 is really THE battery to have for your general-use devices.) So I highly recommend the eneloop Pro, as do I recommend the eneloop 2100 and eneloop as a company.
If you are looking for a battery that gives you optimal performance with your high-drain devices, but would prefer an alternative to expensive lithium disposables, the eneloop Pro is the balanced choice of outstanding performance, outstanding value, and outstanding longevity. There really is no substitute.
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