These are incredible rechargeable batteries. I have a pair of headphones I have used regularly for 15 years now that use these batteries. I have only changed the batteries 2 or 3 times in those 15 years. They have never exploded. In those 15 years I would have used more numerous disposable batteries than I can imagine. This is definitely the cheaper, more convenient way to go not to mention more environmentally friendly.

Vengo de unas pilas chafas steren que ya no retenían carga y estaban prácticamente nuevas.Con estas se siente la calidad, hasta son un poco más pesadas y según la caja vienen precargadas. Espero sean más duraderasMuy contento con el producto

Llevo unos 6 años usando esta marca, el cargador funciona genial y las pilas nunca me han decepcionado. Aún las que ya tiene estos años, no he notado una degradación, supongo que ya la tienen pero no la he percibido.Mi uso principal sin un mouse y teclado, control remoto y los juguetes de mis pequeños

Como siempre excelente marca.Duracion mas que suficiente, carga bien y excelente calidad.

One of the standout features of these Eneloop batteries is that they come pre-charged and are ready to use right out of the box. There’s no need to charge them initially, which is super convenient, especially if you're in a rush and need power immediately.Using these rechargeable batteries significantly reduces the need for disposable ones, which is a big win for the environment. Knowing that I’m not contributing as much to battery waste feels great, and the long life of these Eneloop batteries makes them a more sustainable choice.What really sets these batteries apart is their low self-discharge feature. Even after months of sitting idle, they retain up to 70% of their charge, making them reliable for devices you don’t use daily. This feature is great for emergency equipment like flashlights, where battery life is critical

Me hacían falta estas pilas para poder usarlas con mis control remoto

Ya tiene varios años que las compre y siguen funcionando perfecto…. Las usan casi a diario para el control de la consola de videojuegos

Lo uso para un monitor Holter que debe durar 24 horas, así que me ha servido bastante. Las pilas normales solo me duraban un poco mas de 24 horas, pero las recargables me resultaron mas efectivas. Realmente el ahorro es considerable. Solo resta ocuparlas en otros dispositivos.

Las estoy usando en mis teléfonos inalámbricos, ya llevo algunas semanas y no ha bajado nada aún... Y ni siquiera las he cargado (tal como venían del parque las instalé)... En estos tiempos de encierro, las llamadas por el servicio fijo (que casi todos tenemos incluido, pero sin utilizar) tienen una calidad excelente, siendo una buena alternativa a los celulares... En fin, usemos lo que ya pagamos pero que no utilizamos hehehe.A ver qué tiempo duran sin cargarse ;-)Las recomiendo totalmente.

Su fama les hace honor, bastante buenas, viene precargadas y vienen 8 en el blister, hechas en Japón, 1.2 V Ni-MH, el paquete dice que se puede recargar arriba de 2100 veces, también menciona que su capacidad es arriba de 800 mAh. Están bastante buenas y las conseguí a un súper precio, muy recomendadas.

The product shipped is an older model BK-4MCCE/4BN and not BK-4MCCA8BA as shown.The older model holds charge for 5yrs vs 10yrs in the newer model. It is unfortunate that this practice continues despite being reported earlier.

Good batteries. still using on the factory charge and not drained out.

[this review is for the AAA 8 pack, although much of the information applies to other Eneloops.]The batteries arrived packaged on a card as shown in the photo on this page. I confirmed these are the latest 4th generation Eneloop batteries as advertised. The date of manufacture is imprinted on every battery, and although difficult to see, I found this set was made 5 months prior to receipt.With any low self discharge battery (LSD NiMH), one should perform an initial and periodic "conditioning" comprised of charging and discharging the cell 3-5 times in a charger that has this function (sometimes called "refresh") in order for the cells reach their maximum energy storage capacity. After conditioning the AAA batteries, all 8 exceeded 750mAh capacity (the advertised minimum), with values ranging from 762mAh to 778mAh. The very narrow range is an indicator of high quality and consistency in the manufacturing process.What follows are general recommendations to get the most from Eneloop and other LSD NiMH rechargeables....Get a good quality charger if you use Eneloops or other LSD NiMH batteries. Cheap chargers will significantly shorten the life of these high quality and somewhat expensive rechargeable batteries. The charger must be a microprocessor controlled "smart" charger that chargers each battery individually, not in pairs. I use a Titanium "smart fast" charger when bulk charging many batteries, and a Opus BT-C2000 when trying to get accurate measurements on capacity and internal resistance. These are there several others good quality chargers out there so be sure to read reviews from people who understand and discuss the technical aspects of battery chargers. That 15 year old old battery charger you have that came packaged along with some long since thrown away rechargeable batteries should not be used.Not all devices are designed to work with rechargeable batteries. The nominal voltage of rechargable NiMH batteries, 1.2 volts, is less than the alkaline equivalent at 1.5 volts. Some devices work well with either one and some are only designed for the higher voltage alkaline. This not a problem with the battery, it is a problem with the way the device is designed. Unfortunately it's rare for a device manufacturer to mention how (or if) it works with rechargeable batteries so you will have to test it or read the experiences of others.Devices that display the amount of power left in a battery will be inaccurate when using rechargeables and tend to indicate the batteries have less power than they really do. A device may show 2 out of 4 bars, when in fact the Eneloop might really be at 85% of charge.Rechargeable batteries like Eneloops (LSD NiMH), store 20-35% less energy than a good quality alkaline of the same size. This is not a "problem" with the rechargeable battery, it is a characteristic of the chemistry and how the energy is stored. That means you can not expect them to last as long between charges as an alkaline before replacement in most applications. LSD NiMH batteries however do hold more energy and last longer than carbon zinc batteries aka "heavy duty" (these are the really cheap batteries you may see at the dollar store or come prepackaged with low end flashlights).Rechargeable batteries should not be *over* discharged as it will damage them. Unfortunately it's hard to tell exactly when the ideal time is to recharge so it's better to stay on the safe side and recharge early when device performance starts degrading and not wait until it's completely dead. The best way to tell for certain is to test with a battery tester that measures voltage under load and recharge when the battery gets to about 1.1 volts Even some cheap battery testers can do this (look for BT-168D) or for a more expensive one the ZTS mini 9R. If all you have is a voltmeter, recharge when the open circuit voltage at rest is about 1.22v.Rechargeable batteries should not be charged too quickly as the internal heat build up will damage them. For AAA NiMH, it should take 2-5 hours to charge fully depleted batteries. If your charger goes from empty to full in 30 minutes, it is either damaging or under charging the batteries.Devices that automatically charge the batteries, such as cordless phones or cheap solar lights, are not a good candidate for Eneloops. These devices use "dumb" charging circuits and will likely overcharge the batteries shortening their life. For these types of batteries you are better off with cheap NiMH batteries that are not marketed as low self discharge (LSD).Devices that use a very small amount of constant power, such as a battery powered clock, might be better off with an alkaline. An alkaline may only need to be replaced every 3 years in such applications, where as the rechargeable may need charging in less than a year due to higher self discharge rate and lower nominal voltage. You will need to test it to be sure and decide what makes the most sense.Infrequently used low power devices such as a TV remote in a spare bedroom are usually better off with alkalines. A high quality alkaline may last 5 or more years, and the cost/benefit of an LSD NiMH just isn't there. Be cautious of low quality batteries this these sorts of applications as the battery may leak after a couple of years.Eneloops (and LSD NiMH in general) are better than alkalines in high current applications. An Eneloop can move energy faster to the device than an alkaline. Examples where LSD NiMh out perform alkalines are modern photographic flashes, remote controlled cars/planes, certain high output flashlights.Marking your batteries is a good idea, especially with you have many purchased at different times that all look the same. I mark mine by putting the year/month I purchased them, followed by a unique letter. When I first get them, I test their capacity and log it for future comparison. Even if you don't have the equipment to perform extensive testing, just knowing when you purchased each battery can be helpful down the road.Properly managed, high quality LSD NiMH batteries like Eneloops will give a long life. Abused, they will not do any better than cheap NiMH batteries. Most of the complaints and bad reviews are from people who do not understand the limitations, use them in the wrong application, or who do not properly charge them. Correctly using rechargeable batteries takes some work and isn't for everyone, but if you can deal with their idiosyncrasies, they can save a lot of money in the long run.