April 26, 2019 posted by

Operating instruction for the Duracell CEF14AU NiMH Battery Charger. Two Charging Channel. • 2 or 4 cell charging in combined slots (labeled). Bi- color Charging Status LED Indicator. • Red = Charging. • Green = Complete. Find solutions to your duracell cef21 question. Get free help, tips & support from top experts on duracell cef21 related issues.

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This is a very good device for your electronic needs.

What the circuit is doing such that it seems almost entirely insensitive to the resistance between the AA and AAA posts is a mystery. We have tried a few brands before and actually dufacell to buy Duracell’s brand one day. My eyesight is the bother. Perhaps this is done out of some strange idea that consumers are going Future repairs, if any, are to be taken care of by you.

Duracell CEF21 disassembled modifications, anyone? However, when I follow the circuit traces that does not seem to be the case. Refer to eBay Return durcaell for more details.

Although the mAH batteries will charge faster, their capacity is lower. Contact the seller – opens in a new window or tab and request a shipping method to your location.

The low-end manufacturing, having to remove the adapter or carrying case to synchronize his phone, utility doubtful. AAA batteries are different, however. Results 1 to 30 of Minimum monthly payments are required. The first time we bought this compact charger about five years ago. It sure is a durable and efficient battery around and works long really long.

I think there is a similar situation with the AAA connections: Not only is it more convenient that plugging it into your computer, it also charges faster. The AAA cell took about 5 hours to charge as normal. You are covered by the eBay Money Back Guarantee if you receive an item that is not as described in the listing. Flashes once, then no light no matter how often you press the button on the end.


Duracell Rechargeable Accu 1 Hour Fast Charger I really do not know why it is that so many electronics companies these days seem to want to plaster ever longer and ever more ridiculous names across the front of the packaging of their products. After I charged a Hybriloop up to 1. Please assign your manual to a product: This item will be shipped through the Global Shipping Program and includes international tracking. Flashlights and Parts WTS: In each case there seems to be a thick current supply trace leading to the AA connector, and one thin voltage sensing?

Q4, Q8, R5, C12 on the bottom view.

Duracell NiMH AA and AAA Battery Charger Model CEF21 | eBay

I don’t think the charging circuit is using a linear regulator. The “AA” trace in the top left marked with yellow ultimately makes it way thru R13 to pin5 positive input of the LM Report item – opens in a new window or tab.

The charge stays in the battery longer than a normal Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab Add to watch list. When an AAA cell is being charged the charging current will pass through the resistor producing a voltage drop of mA x 0. I have been trying to avoid any destructive modifications or use of a soldering iron until I could verify that a planned modification would work, however I am now running out of ideas.


The AAA battery post is the inner post with the three solder lugs.

I’m not sure you have picked out the correct resistors? Very rarely, the AAA batteries will lose connection to the charger and start over.

duracell battery recharger instructions

No additional import charges at delivery! I traced the two signals in your high res photo and found that the 50mV signal is used to drive one of the four comparators found in the good old LM quad comparator. Add to watch list. I have higher resolution versions I could link to. Have you looked in the manual?

Duracell Charger –

You can use it to charge any kind of rechargeable batteries that you have. So to make life easier I produced a composite image with both sides overlaid and lined up with each other. To have the charger put out a mA current, I suspect it would be as simple as configuring the outputs to put out a logic “LOW” pins 1, 2, 13 and Therefore almost any voltage differential between the AA and AAA posts trips the comparator and flips the circuit duracdll low current mode?

Even though finding the charger, something I I shall examine your diagram with interest. Learn More – opens in a new window or tab International shipping and import charges paid to Pitney Bowes Inc. Seller information 0rquita Your opinion is valuable. Seller does not offer returns. We can only provide support As Euracell write this I think I might have a different meter with a max hold setting.