eneloop AA 2100 cycle, Ni-MH Pre-Charged Rechargeable Batteries, 4 Pack

Sometimes the engineering and manufacturing quality of a product is so good, you just have to marvel at it. Eneloop batteries deserve that sort of admiration. Instead of reiterating all the positive testimonials and the great testing results from the battery geeks, I want to describe my experience with Eneloop batteries exposed to environmental extremes. I drive for a living in New York, with multiple battery-operated devices in my car that I need on a daily basis. When I'm not working, the car is parked outside in the open. During a winter cold snap, temperatures can drop into the teens or even occasionally the single digits. In a summer heat wave, temperatures can approach or even exceed 100 F. With the sun beating down on it, this makes the inside of the car a brutal oven-like environment. Of course it's better if my devices can just remain in the car and be ready for action when I start work, but I worried about how the Eneloops would be affected by the seasonal temperature extremes. The detailed online literature from Sanyo indicates that Eneloop batteries are especially well-suited to working in cold temperatures. My experience confirms that they feel perfectly at home in the bitter cold, unlike alkaline batteries. My devices have always worked fine without needing to warm up, and there were no ill effects on the batteries whatsoever. My bigger worry was about the summer. Heat can be the enemy of batteries, and there are no operating temperatures beyond 50 C (122 F) mentioned in the Sanyo literature. My experience, however, was that the Eneloops stood up well to the heat. If I got less life out of a battery charge, it wasn't anything noticeable. The self-discharge rate was theoretically higher, but it's still low even if the batteries get hot. This confirms some tests I read online by a user who compared Eneloops stored in a car under the Texas sun versus some charged at the same time and stored indoors. After several months, there wasn't a big difference between the performance of the two sets in a flashlight. Apart from the self-discharge rate, one could question whether being in a hot car doesn't damage the batteries or shorten their life. While I can't definitively answer this, I feel confident in stating that they are at least resistant to deteriorating in hot conditions. The most challenging situation in my car was an Eneloop-powered LED light bar mounted at the top of my dashboard right by the windshield. Those batteries had to deal with the high temperature in the car during the day (I drive at night), plus the direct sunlight beating down through the glass. Eventually the power button on the device oozed and cracked until it no longer worked properly. I had to throw out the light, but the three AAA Eneloops looked none the worse for their ordeal. I tested them in my La Crosse BC-700 and their capacities came up as 792, 821, and 814 mAh at a 100 mAh discharge rate -- still performing up to spec. Another application where the Eneloops work well in challenging temperature conditions is in my bicycle lights. My bike is stored in the garage and the lights are very important for making me visible to motorists. Summer or winter, they do their job powered by Eneloop batteries. It's good to know that you can depend on Eneloops for both indoor and outdoor applications in a variety of climates. They work in pretty much all conditions and are suitable for just about any type of device. I use them in everything from remote controls to high-draw devices such as a tactical flashlight. Let me just mention that battery charge indicators on electronic devices don't read correctly with NiMH batteries, including Eneloops. This can cause some confusion and the occasional complaint that the batteries run down quickly. They don't! What's important is how long they power the device, not what the battery indicator reads. Because the voltage curve of the Eneloops is very different from that of alkaline batteries, the battery charge indicator on your device will drop relatively quickly at first and then hover at a partial reading for most of the discharge cycle. This is normal. The device will still operate for a long time on one charge of the Eneloops. I would give Eneloop batteries a 6-star rating if I could.

I've been using Eneloop batteries since they first became available, and not a single one of over 40 cells has gone bad. None of the cells, including the very first ones I bought, have lost any capacity over the years, as measured by a LaCrosse intelligent charger. I've purchased about a half dozen different brands of rechargeable cells over the years and none of them have lasted more than two or three years. The Eneloops do cost a bit more than other brands but they last so many times longer and continue to provide full capacity that it just doesn't make sense to buy anything else. These are much cheaper in the long run. If you haven't used a low self-discharge type of battery before, do yourself a favor and try some of these. A non low self-charge AA nickel metal hydride battery needs to be charged every month or two as the batteries lose a little bit of charge every day. The low self-discharge Eneloop batteries maintain their full charge for a really long time. Even after a year of storage it'll still have most of it's capacity and you'll be able to use it right away without having to recharge it first. For anyone who does a lot of photography, as I do, this is a really big point. Another plus to the Eneloop batteries is that they put out slightly more voltage than other cells. An alkaline AA cell, when new, measures about 1.5v. A typical nickel metal hydride battery is 1.2v. The Eneloops measure 1.4v when fully charged. This is means that compared to other rechargeable cells, the Eneloops will be a little brighter in a flashlight, will recharge a flash faster, and if used in a motor drive you'll get slightly faster FPS. The slightly higher voltage makes the Eneloop batteries suitable for uses where normal rechargeable batteries aren't. A TV remote control, for instance, may not work too well at 1.2v and would require charging every month. An Eneloop powered TV remote will have almost as much voltage as alkaline cells and would probably last a year or longer before needing a recharge.

Working Good as of now

Attention le titre du produit ainsi que son tarif laissent penser qu'il s'agit de 4 packs de pile alors qu'il n'y a qu'un paquet ! Hors un paquet coûte en moyenne 15 euros... A éviter !

Great Product ! Shipped in great condition and delivered well on time. Thanks !

Very Good

Ho acquistato queste pile ricaricabili suggerite da un'amico e mi sono trovato molto bene inizialmente. Al momento ho fatto circa 30 cicli di carica/scarica (con apposito caricabatterie) e adesso non hanno più la prontezza che avevano prima. Specifico che le uso esclusivamente per il Flash a slitta della macchina fotografica e ci vogliono 2/3 secondi prima che si ricarichi, cosa che all'inizio non succedeva. Per il resto vista la cifra mi ritengo soddisfatto anche se ogni stagione di matrimoni ne dovrò acquistare un set nuovo.