Duracell CEF15NC 15 minute Battery Charger Review

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(More customer reviews)The Duracell 15 Minute Battery Charger has 4 channels (or battery slots) for charging 4 AA / AAA batteries.
Charge Time
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- The battery charger works as advertised; it fully charges NiMH rechargeable batteries in about 15 minutes. Charge times can be longer for batteries that are higher in capacity than the ones that come with the charger (2500 mAH). For example, it sometimes takes up to 20 minutes to charge my 2650 mAH AA Duracell batteries.LED Light
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- The LED light can indicate one of three charge status:
1) Off ......... Charge is complete for all channels
2) On ......... Charging is in progress on at least one channel
3) Blinking ... 1 or more batteries are bad
Unlike some battery chargers (such as the Energizer 15 Minute Charger), it doesn' have 4 independent LED lights to indicate charge status for each of the channels. There's, therefore, no way to know WHICH channel has completed its charge and WHICH channel has a bad battery.Bad Battery Woes
----------------
If the Charger detects a bad/damaged battery (indicated by its blinking LED light), it will refuse to charge the battery.
This charger used to frequently reject batteries that I had used only a few times (money down the drain). I had to keep buying new batteries -- and that was very annoying!
At first, I thought maybe this charger was actually ruining my batteries! But I managed to finally catch on to what was happening: my camera was the culprit!
The reason: on many camera's and other high-drain devices, batteries can be over-discharged and can go through a phenomenon known as "polarity reversal." Many devices have a built-in mechanism to detect when batteries reach a "cut-off" voltage (or more properly termed, the end-of-discharge voltage), and shuts down automatically before damage can occur. Many devices, however, do not have such a mechanism.
Now, I'm careful to not over-discharge my rechargeable batteries - I have never had a bad battery in a long time.Conclusion
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The Duracell 15 Minute Battery Charger works flawlessly. My only complaint is that it doesn't have 4 independent LED lights to indicate charge status for each of the channels.


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PowerUP Battery Charger for AA & AAA Batteries with (4) High Capacity AA truCELL 2700 series Rechargable Ni-MH batteries Review

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(More customer reviews)The four AA rechargeables alone are worth the price. The charger is primitive--no automatic shutoff, no on/off switch, no labeling telling you which slots to use if you are charging only two batteries--but it works.
It took me a few minutes to realize that there was a plastic film that needed to be removed from the contacts on the charger before it would work.

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Rapid Charger Nimh + 4 Aa Review

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(More customer reviews)So far this has worked inconsistently. I have another charger and batteries from some solar lights and I get inconsistent results. Some times the other batteries do not want to charge in this unit. If I charge them in the ohter unit (a slow charge unit), they seem to then work okay. When it does work it does charge in about an hour.

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Duracell Mobile Charger With 2AA And 2AAA Pre Charged Rechargeable Nimh Batteries, CEF23DX4N Review

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(More customer reviews)The Duracell Mobile Charger (CEF23) is an extremely versatile charger. It actually has two operating modes, as selected by the MODE button:
1. As an AA/AAA NiMH battery charger, or
2. As an USB charger for USB-powered devices.
In battery-charger mode, the unit is a smart charger that accepts 1-4 AA/AAA cells in any combinations. The charger can be powered by either 100-240V universal AC input, or 12V DC input. This means you can also operate it from your vehicle's cigarette lighter adapter. Note that the car adapter is included in the CEF23DX4N, but not in the CEF23DX2.
The charging current is 550mA for each AA/AAA cell. So it takes about 4 hours to full charge up the included 2000mAh low-self-discharge cells (which are the Duracell-equivalent of Sanyo eneloop). I consider this a good compromise between shorter charging time and longer battery lifespan. Once charging is done, the current is reduced to 25mA (actually 0-50mA pulsed at 50% duty cycle) in trickle charge mode.
One really nice feature of this charger is that it has four individual battery status indicator lights. The status light for each cell turns RED when charging, GREEN when the cell is fully charged. It will even blink if you accidentally inserted an alkaline cell.
In USB charger mode, the unit generates a regulated 5-volt supply at its USB socket. You can then connect an USB-powered device (such as IPOD charger) to this unit. Input power for this USB charger can be from one of the following sources:
1. From 100-240V universal AC input,
2. From 12V DC input (car adapter), or
3. From four AA/AAA NiMH cells in the battery compartment.
The third way is the most interesting, because in case of emergency, you can even use 4 alkaline cells to power this USB charger, in order to charge up your cell phone's battery.
I must say that this charger is really well designed. It is a great bargain even if all you need is a simple battery charger. The USB charger mode is just an extra bonus.
[Update on Oct 7, 2010]:
Duracell has discontinued the excellent CEF23 charger (at least in the US) last year. So prices for the remaining inventory have skyrocketed. The replacement product (Duracell Go Mobile Charger) only charges in pairs, and does not contain an USB charger.
- If you just need an inexpensive 2-cell charger that can handle individual cell, consider the Sanyo eneloop MDR02.
- If you need a good 4-cell charger that can operate from 12V cigarette lighter adapter, consider the Targus LCD2700 with LCD Display
- If you need an advanced charger that can operate from 12V CLA, consider the La Crosse Technology BC500
- If you need a good 4-cell charger that can operate from 12V CLA _and_ can power an USB port using internal batteries... Sorry! Your best hope is to look for an international version of CEF23.
[Update on Dec 1, 2010]
Just in case anyone is still interested in this charger: I recently found out that its USB port is capable of supplying 1000mA output current - even though the spec says 500mA only. I discovered this by accident when using it as a portable recharger for my Archos 5 500 GB Internet Tablet.

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Sanyo Eneloop NiMH Rechargable Battery Charger MC-MQN06U Review

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(More customer reviews)Good charger, lightweight and easy to store as you can fold the prongs out of sight; but there is a better charger from the same company. This is the MQN06, if you can find the MQN05 model which is very rare (usually just comes with an Eneloop power pack kit package), that is the model to get.
The MQNO5 charges each battery individually.
The MQNO6 charges in pairs. That means you cannot charge 1 or 3 batteries only. If you put 3 batteries, it will only charge 2 of them. If you put 1 battery, it will not start the charging process at all.
How can you identify the MQN05 from the MQNO6?
The MQNO6 has 2 LED lights at the bottom.
The MQNO5 has 1 LED light at the bottom.

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Rayovac I-C3 15 Minute Rechargeable Batteries, AA , 4 batteries Review

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(More customer reviews)I read about Rayovac's patent on the I-C3 technology before this product came to market and naturally I was skeptical. A few months after it came to market I decided to try it out.
For over 6 months I've been using these batteries in our toothbrushes, cameras, electric screwdriver, remote controls, two-way radios, CD players, anything that uses AA or AAA. The product exceeds my greatest expectations.
Disregard the high cost comments. This should be viewed as an investment. I can get the batteries locally for about $3.45 each. Figuring 25 cents for an alkaline battery you recover the cost after 14 recharges. 120 recharges and you've paid for the charger.
My family loves this thing. It completely changes your view of battery operated appliances. Not one of these batteries has gone bad. I have a pocket radio that I use constantly. One charge lasts over a week. The batteries do not die suddenly. When in doubt I can top off the battery in less than 15 minutes.
We are never out of batteries and we have an entirely new mindset now that it doesn't cost anything to discharge a battery. At the same time we aren't throwing batteries in the trash can.
It is our view that a battery that costs 25 cents plus shipping and handling per use is far more expensive than one that costs 15 minutes.

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SANYO Eneloop Spacer Pack with 2 AA and 2 C-Size Spacers Review

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(More customer reviews)We were really surprised to see that Sanyo Eneloop has devised a way to make AA batteries fit in all C and D products. We were doubly surprised that Sanyo Eneloop AA batteries can power our virtual walls for our iRoomba robotic vacuum cleaners, speakers, small lights, flashlights and other products.
What a great idea! I love the new ideas that Sanyo Eneloop is developing -- they produce by far the best rechargeable batteries on the market.

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SANYO Eneloop 4 Pack AA NiMH Pre-Charged Rechargeable Batteries Review

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(More customer reviews)Excellent rechargable batteries. These are NIMH batteries, so from what they say, you can 'top them off' without doing too much damage to the overall capacity. They also claim to have a significantly less drop off in overall capacity over time.
For things that don't require frequent charging, like TV remotes, I use regular Akaline batteries.
I use these to power the infrared sensor, kitchen garbage can, that opens automatically. The garbage can needs size D batteries. But ENELOOP makes D size adaptors that you just slide these "AA" into. It's great. So for quite a few months now, these 4 little "AA" batteries have been doing the work of 4 "D" batteries. If you buy these, BUY the adatpers that ENELOOP makes, they come in "C" and "D". You'll never buy "C" and "D" batteries again!!


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TruCELL AA NiMH 2900 Series Rechargeable Batteries - 12-Pack Review

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(More customer reviews)What a great product the mAh rating is much higher than other batteries I looked at. They hold a charge a long time. Use them in my cordless mouse and digital camera with no problems. The cool thing I got a great charger at Sam's Club $4.85 made by Eveready.

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Maha PowerEx MH-C808M Ultimate Professional Charger - Battery charger 8xAA/AAA/C/D Review

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(More customer reviews)This battery charger is a winner. Batteries stays cool (a good thing) fast & slow rates of charge. No overcharging, it seems to FULLY CHARGE the big C & D sizes rather quickly, about 5 or 6 hours. Each battery size has it's own charging points, fixed contacts no springs sliding a metal bar against the battery, less stuff to wear out & break. You can charge AA ,AAA, C & D sizes but not 9 volt. about the only down side to this product. According to sales lit. with proper power cords you can charge around the world. Maha also makes wonderful rechargeable batteries have been using AA, AAA & D sizes for 6 months no problems so far. Mine cost about $ 90 twice what other cheaper crappier chargers go for(some cheapies don't charge big sized/highly rated mAh batteries fully) Thomas Distribution seems to be the cheapest & very reliable vendor.

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Powerex AAA HEAVY-DUTY 1000mAh Rechargeable NiMH Batteries - 2 Batteries Per Pack Review

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(More customer reviews)When I received the batteries I charged them in my MAHA powerx charger. I ran it on the break in cycle which charges and discharges a number of times to charge the battery to the optimun voltage. One battery charged to 900mah. The other only charged to 750 mah. Did the break in charge 2 more times. still the same. Guess I got a bum battery. They work ok but when used as a pair I will only get 750 mah out of the set. The weakest battery determines the output of the pair.

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Duracell 15 Minute Battery Charger Review

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(More customer reviews)I purchased this charger and an additional 8 packs of 4 batteries (36 batteries total) in May 2006, and it is now almost Jan 2008. A few months ago (August 2007), I noticed that I would charge ALL of the batteries, and not use them for a week, then when I went to use them, they were practically DEAD! Even as soon as they are done charging now they probably only charge to 60 percent capacity, and die very quickly. I couldn't believe it. I have had great success with NiHM batteries in the past, but this is ridiculous! I spent hours online, researching battery technology and chargers to find out that any charger that charges your batteries faster than one our SEVERELY DECREASES THE LIFESPAN of your batteries! I purchased a set of Eneloop batteries which hold a charge much longer than any other NiMH batteries on the market. I will be contacting Duracell to find out if I can get replacement batteries for the small fortune I have lost on these.
Don't get me wrong, it's not the batteries that have the problem. Duracell makes great batteries. It's their pathetic charger that killed them all.
Unfortunately, people review these products and give them five star ratings without owning them for more than a few months.
I know someone else who had the same exact problem with the Energizer version of this 15 minute charger.
DO NOT BUY THESE.

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Rayovac 4.0 Rechargeable AA 4-Count (Pack of 2) Review

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(More customer reviews)The product description of Rayovac 4.0 AA cells appears to be intentionally deceptive. It says "Rechargeable Battery with Lithium Technology", but did not mention anything about the battery chemistry, voltage, and capacity. On the front of the package it says "Compare to ADVANCED LITHIUM", and "Ready to use like LITHIUM". All these seem to give the impression that "Rayovac 4.0" is similar to the Energizer L91BP Lithium AA Battery, which has a higher operating voltage (1.6V) and larger capacity (3000mAh) compared to normal NiMH AA cells.
Upon closer examination, however, you'll see the fine print of "NiMH 1.2V" on each cell. Suspiciously, its capacity (mAh) is still not specified. So despite of all the hype, this is still a Nickel-Metal Hydride battery, perhaps with a trace amount of Lithium added to justify the claim of "Lithium Technology".
I tested four Rayovac 4.0 AA cells using my La Crosse BC-900. Right out of the package, they hold an average charge of 1485mAh, or about 70% of full capacity. After two more charge/discharge cycles, their avarege capacity improved to 2080mAh. This performance is nearly identical to that of Rayovac Hybrid AA Batteries, which I have tested many times before. Further examination also revealed that the (+) and (-) terminals of "Rayovac 4.0" are exactly the same shape as "Rayovac Hybrid". Therefore I'm convinced that those two series are in fact the same cell under different wrappers.
I really dislike the shiny wrapper of "Rayovac 4.0" cell. It makes the cell look too much like the Energizer Lithium AA cell, and it doesn't even mention "Rechargeable" on the wrapper. I can only imagine how many of those rechargeable cells were thrown out after first use, because people confused them with desposable cells.
On the other hand, the price for 8 of those "Rayovac 4.0" AA cells is less than half that of Sanyo Eneloop 8 Pack AA (as of this writing). This makes them an amazing value. It is much better to buy those, instead of trying your luck with other so-called "Ready-to-Use" rechargeable batteries from less reputable brands.
[Update on Feb 25, 2010]
Data on long-term self-discharge rate: I have tested four each of Rayovac 4.0 AA and AAA cells, after 100 days of storage at approximately 19 degree C. The average charge retained in both sets were exactly 86% of original. This is consistent with the self-discharge characteristics of Sanyo eneloop and Rayovac Hybrid.

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Maha PowerEx MH-2D110 - Battery - rechargeable - D - NiMH x 2 - 11000 mAh Review

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(More customer reviews)These are high quality rechargeable nickle metal hydride D sizers. 11,000 mAh rated will give you a strong long lasting battery. The more mAh the better, about 12,000 is the tops for D size. Stay away from D sizes that have a low mAh rating such as 2,500 or 3,000 you be cursin' their short life span between charges. Maha makes a proper battery charger for these highly rated mAh batteries. Chech out the C808M charger.

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Sony 2500 mAh AA Rechargeable Nimh Batteries, 4-pack Review

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(More customer reviews)I have owned these for about four months. Mostly they are used in a DSLR camera.
I find that, when freshly charged, they are superb, giving lots of life and fast performance in the DSLR, which relies heavily on good battery power. They also charge fine, with no memory problems, in the Sony charger.
However, these batteries lose power when not in use. Most AAA rechargeables do, of course. But there are a new sort on the market that minimize the power drain when not in use. I have tried some, the eneloops.
They are just plain better than these Sony batteries. Eneloops fire right up and last longer even when they have not been in use for days or weeks. I find this makes a big difference because I don't have to recharge every time I start out a day with my camera.
Hope you find this helpful.

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Energizer CHM4AAWB ACCU Battery Charger Review

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(More customer reviews)I think this product is really great. It saves you a ton of money if use batteries. You can put in the recharger in the socket with the batteries and leave it in over night. It won't get wrecked or anything. The recharger turns off after its done charging up the batteries. This is a great buy!

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ENERGIZER NIMH D 2PKNickel Metal Hydride round cell batteries are the longest-lasting rechargeable batteries on the market today.Batteries can be recharged at any time-no need to fully drain battery before charging.Lifetime Limited Warranty on all Energizer® ACCU RechargeableTM round cell batteries and a one-year warranty on chargers.Limited quantity #353153.

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Duracell Pocket USB Charger with Lithium ion battery / includes universal cable with USB and mini USB, Review

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(More customer reviews)Make sure you are reviewing based on the correct product. See following link for the THREE very different Duracell SmartPower devices:
[...]
Duracell Pocket USB Charger with Lithium ion battery / includes universal cable with USB and mini USB,
1) Instant USB Charger - (1150 mAh) USB and mini-USB ports, Up to 35 hours of backup power. Use the cord of a USB, micro-USB, or mini-USB device to plug into the Instant Charger's appropriate ports.
2) Powerhouse USB Charger - (2000 mAh) Can charge two devices at once, Up to 60 hours of backup power USB port and swinging mini-USB arm. Use the cord of a USB or micro-USB device to plug into the Powerhouse Charger's USB port.
3) Pocket USB Charger - (500 mAh) Up to 15 hours of backup power. Swinging mini-USB arm.
The last one (#3) is the device you should be reviewing. Which according to duracell is only 500 mah which is great for extending your portable electronics runtime because it is compact, light and it fits easily in your pocket. If you want longer run times get the (#1) Instant USB Charger or need to charge 2 devices at once get the (#2) Powerhouse USB Charger.
So please only review the product if you have the correct product info and you know your needs. All three of these devices work well for each of there designed usage.



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Portable 2000mAh Lithium-ion battery for portable devices

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