Amazon Basics 4-Pack Rechargeable AA NiMH High-Capacity Batteries, 2400 mAh, 1.2V, Recharge up to 400x Times, Pre-Charged

A good bit of time has passed to evaluate these batteries in my ROKU 3 (also purchased on Amazon). In the past, I've noted with alkaline batteries in the ROKU that one battery ALWAYS depletes before the other, usually by 1/4 volt. Having seen that issue several times, usually having had to replace only one of the two batteries, I'm concluding the ROKU remote keeps is continuously connected to the ROKU as long as the ROKU is turned on. This would explain why one battery frequently requires replacing. I have noted this phenomenon with two different ROKU remotes. I don't know who makes these batteries but they are very high quality. Also noted is they are about 25% heavier than the Everedy rechargeables at your local retailer. My weight scale is not digital but is still good enough to discern a difference in marking. These batteries (yes I can test voltage) seem to have significant density and hold a charge quite well for an extended period of time. The discharge time for batteries (battery) in the ROKU is over two months. Also, if I remember correctly, a fresh charge will loose only about 40% of it's charge over the course of a year. Battery technology is constantly changing (see batteryuniversity.com for a true education). To that end, these batteries far surpass the junk sold in retail stores. I've not found a 2400 mAh NiMh anywhere at the price point offered by Amazon. Also, please be advised that most rechargeable batteries do NOT (performance-based) match up to their mAh rating. So I'm not sure how these little guys rate, but I can say ... for the price point they outperform the smaller charge-capacity types found in the average retail establishment selling 1400 to 2300 (rare) rechargeables. In my opinion, they are almost worthless as they need constant recharging. These batteries are new-generation batteries and users will appreciate having them. A couple of additional notes: new generation NiMh rechargeables should not be fully discharged or anywhere close to that. The battery lifetime cycle can be extended greatly by recharging only after about half-use; there is no battery memory problem. The newer NiMh batteries are more subject to "stress" so deep discharge shortens their life. Same for cell phones .. don't deep discharge the battery. The battery lasts longer if you recharge after one or two bars. So anyway, these are really good rechargeables at the price point. I can't imagine better unless you want to put 8 or 10 hours into customer reviews and scouring best prices. Better to go for Kentucky Fried Chicken and a half bottle of Chardonnay with your wife out by the stream on a soft Autumn afternoon. Yes? And don't forget the music powered by the batteries that don't fail, even if you forgot to recharge them. :-)

I have previously tested the AmazonBasics AA Pre-Charged Rechargeable Batteries (in white wrappers), and concluded that they are just rebranded Sanyo eneloop AA Batteries . When I first heard about the new AmazonBasics High-Capacity Pre-Charged Rechargeable Batteries , my immediate suspicion is that those are rebranded Sanyo eneloop XX batteries . That's why I purchased this product for testing, just to satisfy my own curiosity. I measured a set of those AmazonBasics 'high-capacity' AA batteries, using my La Crosse BC1000 Battery Charger/Analyzer . Here are my findings: - Right out of the box, the average remaining charge was 1204mAh, or 48% of the rated 2500mAh capacity. Date code on them says '2014-02', but just like other eneloop batteries, they were not fully charged when then left factory. - After just one recharge/discharge cycle, the average capacity jumped to 2547mAh. - After another two more recharge/discharge cycles, the average capacity settled at 2555mAh. The spread is very tight between 2510 and 2610mAh, which indicates good quality control. The above behavior is nearly identical to that of the Sanyo XX cell, which I have previously tested in 2011. Mechanically, the AmazonBasics high-capacity cells appear identical to the Sanyo XX. Refer to the photo I uploaded to the 'Customer Images' section, and you will see that they have exactly the same shape for positive terminals, same texture on their wrappers, even down to the same 'vent hole' design. I should note that the Duracell 'Ion Core' AA Rechargeable Batteries also have identical electrical and mechanical characteristic as the Sanyo XX and AmazonBasics High-Capacity batteries. The Duracell batteries are marketed as just 2400mAh, even though they were tested to be over 2500mAh in capacity. I believe this is done for price differentiation purpose. Bottom Line: As of this writing, you can get an 8-pack of Amazon High-Capacity AA batteries for less cost than a 4-pack of eneloop XX batteries. So obviously the AmazonBasics version is a great bargain. My advice is to grab them - before Amazon gets greedy and jacks up the price. One important note: The AmazonBasic High-Capacity AA (or Sanyo XX, or Duracell Ion Core) is fatter than a normal-capacity NiMH AA cell, which itself is fatter than a typical alkaline AA cell. So it may not fit if your appliance has extremely tight battery compartment. [Update on Dec 10, 2014] Long-term self-discharge data: Tested one pair of AmazonBasics AA high-capacity batteries after 5 months in storage. The average remaining charge is 2175mAh, or 85% of the original capacity. This is even better than my previous 5-month test result for Sanyo XX batteries which showed 2040mAh, or 78% of original capacity.

Using them in a wireless Xbox 360 controller. Use it an hour or two a day. Still on their original charge. Standard alkaline batteries would last about a month. It's been over a month since I've gotten these and the controller is still working. The only issue is that these batteries are a little thicker than alkaline and they also do not have that "nub" on the bottom. It took a bit of cramming and jiggling in the controller's battery compartment for them to make contact and work. Other than that, they are fantastic so far!

What everyone says is true. These deliver on the promise of NiMH. Coupled with a fully-independent-bay smart charger (I use Opus but it's not the only one) these cells pack a punch and last, and last, and last… if you burn through battery power and have to recharge daily, these are not the cells you want, but if your devices, especially safety devices, sit unused for months or years at a time, then HAVE TO WORK, well, then they should have lithium cells in them. In between, devices that get moderate, irregular use, which is the vast majority of devices, this cell is the ticket. The price for their power density is fewer recharge cycles, but they deplete more slowly (much more slowly when not used) so they need fewer recharges. If you recharge once a week these will last a decade, but I've left them unused in a camera for a month with no discernible loss of capacity. Recharge once a month and these will probably outlast you. That's sufficient.

I am fairly new to rechargeables and the first thing that jumps out at me is the cost of any brand with a decent reputation. To me that means spending the money up front to get "smart" charging and evaluation equipment. That reduces the chances of ruining new batteries, or worse yet ruining the devices being powered. I purchased a Nitecore and and an Opus bt-c3100. Quickly I learned to categorize 18650 batteries into three rough groups: total scam batteries that should never be used because they barely put out any power and cannot hold a charge. From reviews I have seen that means 400 mah hours or so from an 18650. The second category is the extremely common "knock-offs" that copy, sometimes well and many times poorly, popular top performers and sell for much less. These from what I have seen and from my own observations can have power output of anywhere from 30% to 80% or so of the power of the tried and true name brand. I thought long and hard before purchasing the newest Amazon AA nimh high-capacity knowing they were not made in the Panasonic eneloop factory and were fairly pricey. But I felt it would be a good learning experience and for now I only power led flashlights and solar walkway lights. The first thing I did was read the directions!!!!!!! and it said charge at 250 mah. The nitecore only goes down to 300 mah so I first discharged them on the Opus at 200 mah for 12 hours 20 minutes to 1-1.1 volts and all four(sorry no statistically significant data from this guy) gave off a measured 2440 or more mah , a little better than the rating of 2400 mah. Charging at 200 mah took 13 hours and the cells absorbed 2570 mah , well above the 2400 rating. I will leave the discharge and power analysis to the electrical engineers with the knowledge, expertise, and software. I will give my layman's opinion that initially these four Amazon high-capacity nimh batteries are not fakes stuffed with sand and appear more promising to deliver good service than the knock-offs that cut critical corners to keep the price down. I recommend to other newbies to take the time to charge all rechargeables conservatively with a smart charger. It is probably a good idea to first discharge and recharge these batteries even though mine came fully charged. You would not take your brand new car and redline the engine out of the showroom. Show you Amazon batteries the same care. Maybe Amazon should offer detailed break-in instructions with all new rechargeable batteries. That could help eliminate many of the bad experiences and bad reviews.

We recently had a baby and it seems like everything for kids takes batteries. Instead of buying tons of disposable batteries I invested in rechargeable batteries, which isn't cheap. But the AmazonBasics batteries are a much better value and made it easier to do. I've been using them for a couple months now and they seem to be just as good as any other battery, maybe better. We have an electronic door lock and these batteries last longer in it by far than my old batteries. So far we are very happy with these. There have been no issues, they charge quickly and lost a long time. Will be buying more AA's very soon as we are already down to only 2 spare batteries!

Whoever makes these, they seem to work well. I'm using them as battery replacements for some Ooma phones.

I have bought 4 of these batteries and used them in remotes to hobbies to controllers to toys. In low energy usage items they are okay, however when the demands are higher they tend to fail.... regularly. The batteries performance is not matched from battery to battery. So if you put 2 in a device, 1 may work fine while the other gives out earlier than it should and you throw them on the charger again. To compensate for the issue I bought more batteries so I could have multiple charged replacements on hand at any given moment. Unfortunately over a year several of them would no longer take a charge. The Amazon Basics batteries work..... and if you want a rechargeable battery at a cheaper price, they will fit the bill so long as the demands are not too high for a long period of time. You can get a couple months of good performance out of them before you start seeing diminished output and lifespan. NOTE: I decided to purchase Eneloop Pro rechargeable batteries as replacements instead and they have performed much better. They cost more but I feel the dollar to value is definitely there.

Las pilas AA recargables de Amazon Basics son una opción práctica y económica para dispositivos de uso frecuente, como controles remotos, cámaras, linternas, y juguetes. Con una capacidad de alrededor de 2000 mAh (para el modelo estándar), ofrecen una buena duración de carga, y se destacan por su ciclo de vida prolongado, soportando cientos de recargas sin una pérdida significativa de rendimiento. Ventajas: • Buena capacidad: Tienen una capacidad respetable que proporciona una duración adecuada para la mayoría de los dispositivos. • Ciclos de recarga: Su durabilidad permite recargarlas hasta 1000 veces. • Costo: Son asequibles y tienen una buena relación calidad-precio en comparación con otras marcas. • Bajo efecto memoria: Mantienen su carga incluso cuando no se usan por periodos prolongados. Desventajas: • Pérdida de carga en almacenamiento: Aunque son de baja autodescarga, después de varios meses sin uso pueden perder parte de su capacidad. • Tiempo de carga: Dependiendo del cargador, pueden tardar varias horas en recargarse completamente. En resumen, son una opción sólida para quienes buscan pilas AA recargables confiables y de bajo costo para dispositivos de uso diario.

Rapporto qualità/prezzo molto buono. Consigliate.

Las pilas AA recargables Amazon Basics han sido una excelente compra. Vienen precargadas, lo que es muy conveniente, ya que puedo usarlas de inmediato sin necesidad de cargarlas previamente. Tienen una buena capacidad y durabilidad, lo que las hace perfectas para dispositivos que consumen más energía, como controles remotos, cámaras y otros aparatos electrónicos. En cuanto al rendimiento, las pilas funcionan muy bien. Ofrecen una duración más que adecuada en comparación con otras pilas recargables que he probado, y la recarga también es eficiente. El hecho de que sean de NiMH (Níquel-Metal Hidruro) las hace una opción ecológica y económica, ya que puedo reutilizarlas muchas veces sin perder eficiencia. Lo único que me impide darles las 5 estrellas es el aspecto estético; aunque esto no afecta el rendimiento, las pilas tienen un diseño sencillo que puede no ser tan atractivo visualmente, pero para mí, lo importante es la funcionalidad y durabilidad, y en eso cumplen con creces. En resumen, las pilas recargables Amazon Basics son una excelente opción por su relación calidad-precio. Si buscas una alternativa confiable y económica a las pilas desechables, estas son una opción recomendada.

Wir haben inzwischen für diverse Spielzeuge, Lampen etc. über 100 Akkus im Haus im Einsatz. Zuletzt habe ich Die AA-Akkus von Amazon Basics gekauft, aufgrund des günstigen Preises und der guten Bewertungen. Ich bin mit den Akkus zufrieden - gefühlt halten sie trotz größerer Nenn-Kapazität nicht ganz so lange durch, wie die weißen Eneloop, aber das kann natürlich auch immer vom Anwendungsfall abhängig sein.

As described