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Duracell Battery Charger With USB Including 4 AA Batteries CEF23
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- Includes 4 x AA rechargeable Batteries
- Charges AA and AAA batteries in 2-6 hours
- Supplied with UK plug
- Incorporates USB power port
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The Duracell CEF23 charger charges both AA and AAA batteries in 2-6 hours and is supplied with a USB port to power or charge devices with USB connectivity. It is supplied with 4 x AA batteries.
Duracell has been powering the needs of people around the world for more than 40 years. Their products serve as the heart of devices that keep people connected, protect their families, entertain them and simplify their increasingly mobile lifestyles. They are the world's leading manufacturer of high-performance alkaline batteries and a recognised leader in advanced battery technologies including lithium, manganese dioxide and zinc air batteries as well as nickel-metal-hydride rechargeable batteries.
Duracell's products are designed to give you maximum power. Whatever your power needs, it will last longer with Duracell.
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Duracell are hardly advertising them, but the batteries with this charger are the new technology low self discharge long shelf life batteries which you can charge and leave - without worrying about them discharging and becoming none-rechargeable after a couple of months.
It is not unusual for a charger to take four batteries at a time. But this charger treats each battery as an individual - you can charge a single battery, you don't have to charge two at a time (which most cheaper chargers insist on).
The charger measures battery condition at individual level for best battery lifespan (and you will see that no two batteries are exactly identical).
A useful extra is the USB connection which you can use to (slowly) recharge your phone or mp3 player using four fully charged batteries. Useful out in the country away from a mains plug.
The UK plug can be flipped off the unit to allow for other style plugs to be used, but none are supplied in this package.
And a failed battery (it happens) or accidentally putting an alkaline battery in - is indicated by a flashing light. (update) Note however a flashing light could also indicate you have just inserted a fully charged battery- the sensor used seems to try a short charge and then looks to see if the voltage has increased very slightly.
(update 15 months on-) On two of my chargers (I now have three I like them so much) the led flashed for one position for good AAA batteries, after a while, this seemed to be due to a poor connection (the AAA batteries barely touch the terminals) and a good clean together with ensuring the batteries were firmly seated, solved this one.
The unit can charge batteries singly, and can charge a combination of AAs and AAAs. It also has a USB port that can be used to charge a device from the mains or from a set of charged batteries. It's touted as a "mobile" charger due to its compactness, but here is the one reason why it just misses out on being 5 stars: the mains plug attaches to the charger itself, meaning that you need a lot of space around the socket in order to plug it in. Thankfully, the space needed is upwards rather than downwards, but generally I find that a plug on the end of a cable is easier to use in most situations, even if you lose a tiny bit of "portability".
If looking to buy a set of AAAs to go with the charger I'd recommend the "Stay Charged" Duracells. These are the rebranded equivalents of the "Active Charges" that come with the unit, and feature the same LSD NiMH technology mentioned earlier.
Amazon are currently selling these units for £ - an absolute steal at anywhere near this price.
Now, the good part: the battery charger. The charger charges 1 to 4 AA or AAA (in any combination) batteries in 4 hours (AA, less for AAA), with full battery detection/overcharge prevention and bad battery detection. Also, each of the 4 charging lines are monitored separately, so there's no need to charge batteries in pairs, and batteries with different charge levels are charged the amount they need, rather than some fixed amount for all. As a battery charger this device is very well featured. The charger does tick quietly (cutoff timer in use) and will smell of plastic when brand new. Also you'll need extra space around the mains plug since the charger is flush to the plug.
Feedback from the LED lights is reasonable, but a bit limited: one light per charging lane solid red while charging, flashing red for bad battery and green on completion. A button switches a pair of blue LEDs from charge mode to USB mode.
The second good part is the AA batteries provided: Duracell ActiveCharge, which are the low self-discharge NiMH type, the best available AA batteries. Apparently they are rebranded Sanyo Eneloops.
Technical data on USB mode: HTC Hero charges at 750 mA from wall chargers, or ~280 mA from PC USB sockets. With this charger it charged at ~790 mA from AA batteries until charger USB mode broke (numbers from app called CurrentWidget). In theory 4 AA batteries (2000 mAh) would charge an HTC Hero 1.5 times (~1300 mAh).
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