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Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries
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Purchase options and add-ons
Brand | Eneloop |
Product Dimensions | 6"D x 7"W x 1"H |
Item Weight | 0.45 Pounds |
Specification Met | No |
Input Voltage | 240 Volts |
About this item
- 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
Save on Quality Tripod by AmazonBasics |
AmazonBasics 60-Inch Lightweight Tripod with Bag, 2-Pack | AmazonBasics Lightweight Mini Tripod, 4-Pack | AmazonBasics 50-Inch Lightweight Tripod with Bag, 4-Pack |
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This Item Panasonic K-KJ17MCA4BA Advanced Individual Cell Battery Charger Pack with 4 AA eneloop 2100 Cycle Rechargeable Batteries | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | Try again! Added to Cart Add to Cart | |
Price | $23.86$23.86 | -5% $33.17$33.17 List: $34.99 | -10% $26.94$26.94 List: $29.99 | -5% $39.29$39.29 Typical: $41.15 | $14.25$14.25 | $20.72$20.72 |
Delivery | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 | Get it as soon as Tuesday, Apr 2 |
Customer Ratings | ||||||
Battery life | 4.4 | 4.4 | 4.2 | 4.5 | 3.7 | 4.7 |
Value for money | 4.3 | 4.3 | 4.0 | 4.3 | — | 4.4 |
Durability | 4.6 | 4.6 | 4.1 | — | 4.1 | — |
Quality of material | 4.5 | 4.5 | 4.3 | — | 4.3 | — |
Longevity | 4.4 | 4.4 | 3.9 | — | 3.1 | — |
Sold By | Amazon.com | Amazon.com | Amazon.com | Amazon.com | Amazon.com | Amazon.com |
input voltage | 240 volts | 1.2 volts | 1.2 volts | 5 volts | 240 volts | 5 volts |
battery charge time | 7 hour | 3 hours | — | 1.5 hours | 4 hours | 4.5 hours |
weight | 0.45 pounds | 181 grams | — | 225 grams | 0.23 pounds | 0.22 pounds |
From the manufacturer
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eneloop batteries are the perfect balance between rechargeability, power, and capacity for every household device including flashlights, remote controls, wireless electronics and hundreds of other power hungry devices. |
eneloop batteries use a highly durable super lattice alloy which prolongs the life of the material. This improvement increases hydrogen stability resulting in reduced self discharge and long lasting, stable voltage output. |
eneloop and eneloop pro rechargeable batteries are pre charged at the factory in Japan using power generated from solar energy. This process is certified by The Green Energy Certification Center. |
Keep your tactical flashlights, headlamps, walkie-talkie radios and other devices powered in the winter. eneloop and eneloop pro batteries deliver exceptional performance at extreme temps, down to –4 degree F. |
4 Position Advanced | 4 Position Advanced Quick | 4 Position Advanced Quick w/Mobile Charging Technology | |
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Customer Reviews |
4.5 out of 5 stars
1,131
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4.7 out of 5 stars
1,898
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4.6 out of 5 stars
175
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Model # | BQ-CC17SBA | BQ-CC55SBA | BQ-CC87SBA |
Battery Charging | Individual;1-4 AA and/or AAA batteries | Individual;1-4 AA and/or AAA batteries | Individual;1-4 AA and/or AAA batteries |
LED Lights | 4 LED | 4 LED w/charge fuel gauge | 4 LED w/charge fuel gauge |
Charging Time AA | (2000mAh) AA4:7h/AA2:3.5h; (2550mAh) AA4:9h/AA2:4.5h | (2000mAh) AA4:3h/AA2:1.5h; (2550mAh) AA4:4h/AA2:2h | (2000mAh) AA4:4.25h/AA2:2.25h; (2550mAh) AA4:6h/AA2:3h |
Charging Time AAA | (800mAh) AAA4: 6h / AAA2:3h; (950mAh) AAA4:7h/AAA2:3.5h | (800mAh) AAA4:2h / AAA2:1h; (950mAh) AAA4:4h/AAA2:2h | (800mAh) AAA4:4h / AAA2:2h; (950mAh) AAA4:4.5h/AAA2:2.25h |
USB Charging Port | No | No | Yes; Also includes Mobile Power charging technology |
Retractable Plug | AC Retractable | AC Retractable | USB Cord (included) |
Safety Technology | Short Circuit & Input Voltage Detection/Auto Shut Off | Short Circuit & Input Voltage Detection/Auto Shut Off | Short Circuit & Input Voltage Detection/Auto Shut Off |
Voltage | AC 100-240V 50/60Hz | AC 100-240V 50/60Hz | AC 100-240V 50/60Hz Input DC 5V 1A |
Safety Standards | ETL Certified (control # 5003545; standard Class 2 Outputs [CSA C22.2#223:2015 Ed.3] April 24, 2018]) | ETL Certified (control # 5003545; standard Class 2 Outputs [CSA C22.2#223:2015 Ed.3] April 24, 2018]) | ETL Certified (control # 5003545; standard Class 2 Outputs [CSA C22.2#223:2015 Ed.3] April 24, 2018]) |
What's in the box
Product information
Product Dimensions | 6 x 7 x 1 inches |
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Item Weight | 7.2 ounces |
ASIN | B00JHKSMJU |
Item model number | K-KJ17MCA4BA |
Batteries | 4 AA batteries required. (included) |
Customer Reviews |
4.8 out of 5 stars |
Best Sellers Rank | #3,538 in Health & Household (See Top 100 in Health & Household) #20 in AA Batteries |
Is Discontinued By Manufacturer | No |
Date First Available | April 8, 2014 |
Department | Unisex-Adult |
Manufacturer | Panasonic |
Country of Origin | USA |
Warranty & Support
Feedback
Product Description
Panasonic eneloop (4) AA 2000mAh pre-charged NiMH rechargeable batteries are one of the most environmentally friendly and long lasting batteries available to consumers. They retain up to 70% of their charge even after Five years, and can be recharged up to 2100 times. Includes 4 AA batteries and a travel charger with LED indicators.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the quality, ease of use, value, and charging of the battery charger. For example, they mention that the batteries hold their charge well, the process is simple, and it saves money. They appreciate the versatility of the product, saying that it's great for many applications.
AI-generated from the text of customer reviews
Customers like the quality of the rechargeable AA batteries. They say they hold their charge well, have a very strong charge, and stay consistent in strength. They also like that they can be recharged frequently and longevity won't be affected. Some say the batteries can be charge thousands of times and still work great ten years later. The charger is well made and works as advertised.
"...I also like that you can recharge them frequently and longevity won't be affected if you recharge them without being fully discharged...." Read more
"...from my experience so far, these seem to be a nice, well made, high quality, no frills battery, that has all the good traits of both the alkaline,..." Read more
"...Short Summary:-Charges batteries individually which results in proper battery charge, unlike those chargers set on timers or requires..." Read more
"These batteries are fantastic. They've been used in toys, RC cars and mainly my X Box controller. It's been 18 months and they are still like new...." Read more
Customers like the performance of the battery charger. They say it works great and has been working great for many years with very good results. They like that it works pretty much at full capacity and then has a sudden and steep drop in performance. Customers also mention that the battery performs for a pretty long time and has no issues or complaints.
"...service and only has a loss of mAh capacity but they still perform for a pretty long time, can still be a few months sitting idle while the..." Read more
"...I like that they work pretty much at full capacity and then have a sudden and steep drop in performance. I then put in another freshly charged set...." Read more
"...Overall, from my experience so far, these seem to be a nice, well made, high quality, no frills battery, that has all the good traits of both the..." Read more
"...The batteries are great. No problems and seem to last a very long time...." Read more
Customers are satisfied with the durability of the battery charger. They mention that it lasts a long time, holds up well, and doesn't lose its charge quickly. Some say that the batteries are incredibly reliable and long-lasting, and they barely show signs of aging.
"...Using rechargeable Duracells, they hold their charge for a very long time.. almost 10 years in service and only has a loss of mAh capacity but they..." Read more
"...I also like that you can recharge them frequently and longevity won't be affected if you recharge them without being fully discharged...." Read more
"...Overall, from my experience so far, these seem to be a nice, well made, high quality, no frills battery, that has all the good traits of both the..." Read more
"...The batteries are great. No problems and seem to last a very long time...." Read more
Customers like the charging of the battery charger. They say it charges quickly, has a good life, and a nice recharge rate. They also say the charge times vary depending on the battery type and capacity, but they are always available and able to charge. Customers also appreciate the convenience of recharging the batteries and the fact that they won't die unexpectedly. Overall, customers are happy with the charging capabilities of the product.
"...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..." Read more
"...They charged fast with charger, which comes along with it. I recently purchased some amazon rechargeable. I hope they last as long as them...." Read more
"Have a great battery life and they charge fast...." Read more
"...I have noticed a few complaints about the batteries not being fully charged and while there are a few different reasons why there is a rare chance..." Read more
Customers like the value of the battery charger. They say it's worth the extra money, expensive, but well worth the price. Some say it’s a nice way to save money by just recharging them after they're used. Overall, customers are happy with the value and recommend it to others.
"...The Panasonic sounds like a pretty good, cheap alternative and get the ones with the batteries as they are a better deal...." Read more
"...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..." Read more
"...they have more recharge cycles than the battery packs and are cheaper. It's a win win...." Read more
"...Has saved a ton of money on buying batteries" Read more
Customers like the versatility of the battery charger. They say it's great for many applications, perfect for their needs, and good for all-around usage in any normal device. Customers also say it is very handy and typical of Panasonic's practical designs. They also say that it'll charge batteries individually and is a great combination for Xbox controllers.
"Seen on reddit to buy this so I did and it has changed my gaming experience!..." Read more
"These have a good reputation in the flashlight enthusiast community. I find them to be reliable, with high quality." Read more
"...The eneloops also provide more information to the end-user, printing their min/typical electrical capacities on the wrapper...." Read more
"...Panasonic has a good life and recharge rate so hubby is happy." Read more
Customers find the battery charger easy to use. They mention that it has separate charging ports for each battery, the process is simple, and the charger itself is quite easy to operate. They also appreciate the convenient cables and the easy-in, easy-out design. Customers also say the charger is ready to use right out of the package and is ready for installation when needed.
"...Just a good, simple, straight forward, well made battery...." Read more
"...These are ready to use right out of the package. I have bought these before and if needed will buy more...." Read more
"I love rechargeable batteries!! They are always available and a breeze to charge. Do yourself a favor and buy rechargeable!!!" Read more
"...things I like about these is they start out fully charged and ready to go...." Read more
Customers like the size of the battery charger. For example, they say it's small, lightweight, and easy to pack. Customers also say it fits into devices perfectly, and the correct size and style for their solar pathway lights. They say the charger is small, yet lightweight and efficient.
"...fits into the battery compartments better. Second, the quality is excellent. Third, its made in Japan, our ally." Read more
"Perfect to take along when travelling. the plug folds back so the prongs do not get bent. Plug it in overnight for a full charge...." Read more
"...Fit in any device that takes AA batteries. Haven’t used them in freezing temps yet, but they’ve been great in the summer heat and cooler fall temp" Read more
"...My only complaint is that AAA batteries fit a little goofy in this (and many similar) charger...." Read more
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Update 11.04.14 - Be aware of the Chinese knockoffs of Eneloops, they are nowhere near as good as the Japanese ones. The Chinese Eneloops die around 500 cycles while the Japanese ones continue running over 800 cycles. Try to get the Japanese Eneloops if you can as they are generally more reliable. Hopefully Amazon will continue to carry the Japanese ones.
Update 9.27.14 - Did a battery test of the pack i used and the battery that was fully discharged still managed to produce the necessary mAh and was slightly higher than the others. For some reason or another only 2 batteries was slightly higher (maximum of 39mAh difference) capacity so it's unclear as to the reason behind that, though 2 of the batteries were numbered and were discharging for a bit in a tv remote and then in a flashlight so it appears that the more often you use them, the more mAh they will produce. That seems to be the case with any NiMH battery, it's best to use them versus leaving them in storage for a long time. So it is highly recommended you buy what you need, if you need some extras or 'in case' make sure you cycle them through and not just leave them sit in storage for several years without using them. Since basic Eneloop batteries have high recharging cycles, it's better to discharge them fully a few times to break the battery in and use them a few times in a high drain device to keep them working. They don't have to be drained fully, 40% discharged (that's 40% charge left in the battery) is the best which will help keep the mAh up and fully discharging them every once in a while to prevent overcharging and voltage depression (or memory effect) which NiMHs are highly resistant that or even don't even have that problem such as the company has stated, they mostly are susceptible to overcharging though which does cause the voltage depression phenomenon which acts like there is a memory effect.
Regular, cheap NiMHs or just cheap NiMHs in general lose their mAh capacity over time and even when they are just being used.. avoid those types. Eneloops appear to be the best, AmazonBasics, Duracell and most Energizers are good alternatives if Eneloops are not available but avoid most cheap chargers and find a smart charger with Negative Delta V, overheat protection, and capable of charging any number of batteries. The Panasonic sounds like a pretty good, cheap alternative and get the ones with the batteries as they are a better deal. I plan on getting some Eneloops Pro that comes with one of these chargers but with the basic 2100 cycle Eneloops, it's probably not needed to have the higher capacity ones but they do last a bit longer on a single charge for critical usage. I can't wait to see how long these batteries will hold up during the test of time. Using rechargeable Duracells, they hold their charge for a very long time.. almost 10 years in service and only has a loss of mAh capacity but they still perform for a pretty long time, can still be a few months sitting idle while the Energizers i got around the same time (the 2500mAh ones) lose their charge within a few weeks, but can be recharged and then sit for awhile on the charger and they will get a bit more charge out of them but those will primarily be used in tv remotes and other really low drain devices where i don't mind recharging them every few weeks. Anyway the Eneloops perform well and seem to have a long life ahead of them.
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I got the 16 pack and also heard that these batteries are similar to the AmazonBasics which claims they do not lose capacity when over discharged. While i am still in the process of finding out whether the battery that i subjected to an over discharge has lost mAh capacity it held it's ground from zero volts. With the battery fully discharged (or near death) i threw it in a remote with a charged Eneloop and it was showing a sharp decrease from 0.9 volts to 0.4 volts. Then the battery stabilized itself there with no decline or any indication that there was cell reversal (which charges the battery in reverse). I wasn't sure what to make of that, but i have concluded that there is indeed some over discharge protection. I decided to put more strain on the battery and threw the batteries in a flashlight, to my amaze the flashlight, dim as ever was able to light up. I let the batteries sit in there 15 minutes to see if the light would stop working but even after 15 minutes the light was still going. I took the battery out and it was registering just under 0.1 volt. While i was being distracted that i didn't have enough time to unscrew the flashlight to get to the battery i threw the the batteries back in the flashlight and checked it again after 5 minutes. It was still showing just under 0.1 volt. No reverse voltage.
It appears that after my test these batteries do not reverse charge and is somewhat resistant to over discharging, which would be fine mixing a pack of these batteries in different devices. Even after my tests i wouldn't recommend mixing the batteries as i am sure even once these batteries reaches 0.7 volts, they start eating up cycles. I have no idea whether keeping the batteries in a discharged state and using them would start reducing the life of the battery or that they would take up a few cycles, but i still need to test the mAh of the batteries to see whether the one i over discharged has lost capacity, which is the other claim from AmazonBasics and i think Eneloop advertises the same thing. It would also make sense why the AmazonBasics has lesser rated recharge cycles then Eneloops. Eneloops do not advertize they can handle over discharging and it makes sense why they don't want to. They want to make sure the consumer gets the most recharges out of their batteries which would make these batteries the number 1 rechargeable battery company of all time.
Which is why i highly recommend these batteries. These batteries will last a very long time if you take care of them. You probably will never need to buy new batteries as if you were to charge these batteries daily (or discharge them daily) you would still get about 6 years out of them which is hard to come by with rechargeables that are constantly being discharged and recharged with minimal rest. I'm going to give these batteries another test which will only be 2 AA in 100-130F heat. I have had some people say they don't want to switch to rechargeables because they think that heat will ruin the batteries. I beg to differ, while the batteries might not last as long.. with this other test these batteries should have no problem being able to work in the heat and while it might reduce these batteries life to about 2-4 years, it's far better than replacing the batteries weekly spending more money than what you would on rechargeables.
On a fresh charge opened from the package, while it was difficult to understand the date code of the batteries "14-05LJ" and "14-0400" I assume the 14 means the year which would mean these batteries were produced earlier in the year, but again it's not easy to tell based on the letters. If anyone knows that information, leave a comment. Back to a fresh charge from the opened package (literally) I am a bit disappointed from Amazon sending me a product that has been opened, it's possible that it opened during shipping but i did get 2 different date codes on the batteries, but it also appears that Panasonic shipped them this way too. I will say that Panasonics packaging is left to be desired, they could have packaged the 16 pack in a more secure packaging or give consumers a plastic container with the batteries in them but i'm not complaining.. eventually i will put them in a more secure container but for now, the package is holding with some tape.
On a fresh charge, these batteries were able to give my phone a 92% charge using a USB charger, powered by AA or AAA batteries. Provided that if i never did charge the batteries i wouldn't have gotten the 92% charge but after recharging the 4 set of batteries i used already, i will see how much of a charge the batteries will put into after a full discharge. I have noticed a few complaints about the batteries not being fully charged and while there are a few different reasons why there is a rare chance that you would get a set of batteries that are discharged or will not recharge correctly. It is a fact of life and happens with any kind of product out there on the market when they are massed produced. It's also rare that businesses would actually strive to lower that percentage because anything with a 1% defect rate is acceptable loss limits when dealing with a world that strives to have profit over making that 1% happy, though many companies do have exchange policies if you received a defective product.
A couple of things to think about. These are 1.2 volt batteries and while most devices that require 4 batteries will function fine with 4 NiMH batteries, any higher than that and you would start to see a declining performance or even if your product will function with 6 1.2 volt batteries versus the 1.5 volts. The other thing to consider though with that is alkaline batteries are about 50% charged at 1.2 volts so these devices might run fine even with 1.1 volts but that really depends on the device. Recently, i have found that some devices can ask for more than 1.2 volts and can be considering the NiMH batteries as dying or low but it greatly depends whether the device is detecting the voltage or the mA being produced. With that being said, before assuming that these batteries do not come charged consider these things first that the device may ask for more voltage, your charger is a cheap model or does not function properly, batteries only carry 50% of rated capacity from the manufacture which a refresh is in need or that you require more than 4 batteries and the device will not function properly under the 1.2 volt batteries.
With that being said, before you assume these batteries are at fault, try it in a different device or in a flashlight that only requires 1-3AA first after refreshing them a few times and see how they work. With the initial use, i managed to charge my phone up to 92%, it was lower than the http://www.amazon.com/Duracell-Rechargeable-Batteries-Duralock-Technology/dp/B00DSYFAEQ which managed to charge a few devices without being depleted, those are rated at 2400mAh, still on first use these 2000mAh hold up really well and are ideal in just about anything. While there are some devices that won't work well with 1.2 volt batteries and it's not a good idea to use rechargeables in smoke/carbon dioxide detectors or anything really vital to your safety i recommend using http://www.amazon.com/Duracell-Alkaline-Batteries-Preserve-Technology/dp/B00EDK4HXY for high drain devices that often need replacing, for the smoke/carbon dioxide detectors, the classic Duracell battery also rated to last 10 years will work just fine.
Other than that, these batteries hold up really well and i will post back when i got more info on the set of 4 batteries i have been testing with and will soon test another set out in my 2D Maglite (using D spacers of course) to see how long they hold up for.
Next is alkaline. While alkaline's are great for holding their charge over a longer length of time, they have a couple major flaws. First, they have a memory effect, which means, don't treat them right, and you get less out of them. Not to mention, alkaline type's are the most well known for leaking, and corroding things. Nimh types don't usually do that. Plus alkaline types dont get as many recharges as NiMh types do too.
Which brings me up to these batteries. What is nice about them, is they hold a charge, close to what alkaline types do, but they are a NiMh type, which means they don't hold a memory if you don't recharge them right. They have a standard capacity for now days standards for this type of battery, plus, they are made in japan, not in china. I have used these, and recharged them many times so far, and so far, they have preformed excellently. I have measured their capacity, and it is very close to what they say it is, so no false advertising, or inflated numbers there. Just a good, simple, straight forward, well made battery.
If there is any complaints, it would just be this.. and this is standard for all NiMh batteries, not just these. NiMh batteries, say that they hold a charge of, say, 2000 mah. In case you don't know what that means, it is how long that battery will last at a certain drain.. so basically, a 2000 mah battery will last twice as long as a 1000 mah battery. In any case, these types of batteries have to be conditioned to reach full performance. Now, you can just use them, drain them, and then recharge them, and it will eventually condition them after a few times, but basically, what is going on is this. When the batteries are new, a 2000mah battery, may only put out 1500 mah the first time that they are charged.. Then after they are fully drained, and then recharged, you may get 1700mah out of it, then again, next time, you may get 1900, then next time, 2000. Basically, it takes a few full cycles of charging and discharging to get to their full capacity. While this is not exactly a bad thing, it does lead the ill informed to think that they are getting cheated because if they have something that tests the capacity of the battery, they do it when it is new, first full charge, and then condemn the battery for not being as advertised, even when it is. not to mention, that you know that the first few times that you use that battery, you use time is going to be shortened too.
Overall, from my experience so far, these seem to be a nice, well made, high quality, no frills battery, that has all the good traits of both the alkaline, and NiMh types. Really, the only thing that I can think of that could really be improved, would be the price.. I kind of wish that they were cheaper, but in the end, they will save me more money then what I paid for them, so I can not complain too much. I like them enough, and have enough confidence in them, that if people as me about what is best in rechargeable's, I tell them to go with this brand.
Top reviews from other countries
as uotras ate pode ser mais barata, mas ja fiz varios testes e com certeza na grande maioria das vezes, o barato custa caro sim.
PROS:
+ The BEST rechargeable AA battery!
+ Stylish (if that matters to you, ha!)
+ Great battery life.
+ They hold their charge after charging even when not being used so you always have some charged batteries ready to go.
CONS:
- The charging time is a bit slower, but this is generally a non-issue. Other versions have a fast charger if that is important to you.
- More expensive than buying regular AA batteries. (But well worth it, you will get so much use out of these in comparison!)
If you are looking into getting these and reading reviews you should know by now that most people love their Eneloops and that this is a fantastic product!
Reviewed in Canada on March 13, 2024
PROS:
+ The BEST rechargeable AA battery!
+ Stylish (if that matters to you, ha!)
+ Great battery life.
+ They hold their charge after charging even when not being used so you always have some charged batteries ready to go.
CONS:
- The charging time is a bit slower, but this is generally a non-issue. Other versions have a fast charger if that is important to you.
- More expensive than buying regular AA batteries. (But well worth it, you will get so much use out of these in comparison!)
If you are looking into getting these and reading reviews you should know by now that most people love their Eneloops and that this is a fantastic product!
Me han durado bastante la carga desde de las pedí además que ya vienen cargadas y no es necesario cargarlas de inicio.
Reviewed in Mexico on January 10, 2024
Me han durado bastante la carga desde de las pedí además que ya vienen cargadas y no es necesario cargarlas de inicio.