- Amazon has combined the AA and AAA versions of those Duracell batteries into the same product page. So now I look like a fool who says the same things twice. Oh well...
[Previous update on Dec 24, 2008]
I was only half-right when I boldly proclaimed that "Duracell Pre Charged AA are rebranded Sanyo eneloop cells" in my original review. It turns out that the first batch of Duracell AA cells I bought from Amazon are made in Japan, and those are identical to eneloop (both mechanically and electrically). But lately I bought some more Duracell AA from a warehouse club. Those are made in China, and they are identical to the Rayovac Hybrid.
[Original review follows]
Judging from similarity of technical specifications and physical shapes of (+) and (-) terminals, I am convinced that the is actuallyunderneath a different wrapper. Therefore all the good things you heard about eneloop apply to Duracell 'Pre Charged', too.
My own testing has shown that the capacity of eneloop AA cell is slightly above the claimed 2000mAh, and it is able to retain at least 85% of its charge after 5 months in storage. The starts with slightly higher capacity at 2100mAh, but it 'only' retains 80% capacity after 5 months. For all practical applications, both are equally good. Just pick whichever brand (Sanyo, Rayovac, or Duracell) is on-sale, and you can't go wrong.
One small problem with the Duracell 'Pre Charged' cell is that: it looked too similar to the well-known 'Copper Top' alkaline cell. So there is a good chance that people may mistaken it for a disposable cell. Personally, I prefer the distinctive-looking white case of the eneloop cell. I use these batteries for a laser pointer, as a toy for my cat! I shine the light around for her to chase (like a bug!) and have used it for hours per day. Before I bought the duracell, I went through batteries like crazy but these batteries are truly long lasting. You won't be disappointed. I go through a lot of throw away batteries, which add up in $$$ over time rather quickly. I decided to make a large one-time investment and purchase rechargeable batteries and chargers. I bought these plus the Duracell charger and Ray-O-Vac Charger and Ray-O-Vac batteries and have no regrets over the purchase. These batteries work as advertised and arrived promptly. As advertised, they arrive charged and they hold their charge well while waiting to be put to use. They charge quickly and can charge in any charger, not just the Duracell one. A great investment I will use over and over again. This is a product I can recommend without hesitation. Please do buy rechargeable batteries over single use batteries! You'll help save some resources and money by buying rechargeable batteries like these. We must all do our part, and this is a small step towards being a little more environmentally conscious. I bought a four pack of the AA Duracell rechargeable batteries from Amazon and used them for three months. They would barely hold a charge in that time and in March, three of the four batteries exploded in my charger deeming it (and the batteries) completely uselessHave had these batteries about 2 months. Use them in a digital camera. The low self discharge works well; these batteries keep enough charge sitting in the camera for weeks at a time. With a previous set of cheap made in China rechargeable batteries, the batteries would usually be dead when I went to use the camera. After 1 use I ran these Duracells through a test cycle using a Lacrosse BC-500 charger and they uniformly read 2.1 Ah capacity. Mine were made in Japan (good). I love these batteries. Ive had several for rc cars and trucks. They hold a great charge and stay charged just as advertised. I charged them on Friday and Thursday of the following week they were ready to go. Your normal recharges and loses it charge after a day or so. So I recommend these and you wont go wrong. My Apple Magic Trackpad was chewing through two double AA batteries every month. It will take more than a year to earn the investment back, but I get the immediate feel of not putting used batteries in the trash or, better still, the wasted time of "properly disposing" of the batteries. Go green!Since the voltage is only 1.2V (not 1.4V or 1.5V) when they are fully charged, they are not suitable fo all devices. I was hoping to save money using these in my Turtle Beach headset but they have to be charged too often. I went back to using Energizer Lithium batteries. Yes, they are expesive but, they will last me a month before I have to replace them. These batteries had to be recharged 2 or 3 times a week. I have two ancient MP3 players, one I generally use for exercising and one to listen to while out shopping, different stuff on both. Anyway, they're the kind that run on a single AAA battery and I use them a lot so I was eating up a ton of batteries, but still one every 8 hours or so of play in two devices adds up. I switched to these and they work great.
I use these frequently with my since it can recharge one or two batteries at the same time. They seem to hold a charge pretty well over extended periods. I haven't tried up to a year, but they definitely worked 3 or 4 months later, unlike the awful luck I've had with Energizer rechargeables.
The only thing I'd like to see is a little cheaper cost, since you can buy some other brands that seem to work as well for a lower cost, but overall I'm quite pleased.
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