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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PDF Manual Keb drive. Duracell myGrid I like: I ended up buying more rechargeable batteries with higher capacities anyways. Duracell Alkaline D Batteries I’ve been using Duracell batteries for years now, and all I really have to say is that there is darn good reason that the brand is recognized as one of the big name battery brands alongside Energizer, Rayovac, et al.

Other than those small flaws, this charger is well-made and serves a good purpose. I think that temperature sensing is more important for termination with AAA cells than with AA cells.

Hold the body and screw off the In the bottom view they are the two rows of cef211 thick round pads just north of the transformer.

I will certainly consider the idea of removing the appropriate 10k resistors when I work up enough confidence to try it. Let both irons get hot and use them like you would if you were using them as a beginner would with chopsticks i.

Duracell Power Gauge CEF21 mod for improved charging of AAA cells

Duracell Alkaline D Batteries. While I await my next move, there is another neat thing I discovered over the weekend. The positive supply to the LM is 5 V. The data sheet says that all unused pins should be tied to the negative supply so this should be safe and harmless to do. The comparator is configured to provide positive feedback using a 2.


Have one to sell? This amount is subject to change until you make payment. Front Page What’s New? This can be achieved on the input side or on the output side making a few selective cuts and joins.

Please never be afraid to correct me! How about if I just connect pin 5 directly to ground?

duracell battery recharger instructions

Special financing available Select PayPal Credit at checkout to have the option to pay over time. Last edited by Mr Happy; at Seriously good battery power here – the copper top Thread Tools Show Printable Version.

Learn More – opens in a new window or tab International shipping and import charges paid to Pitney Bowes Inc. 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 The site is not responsible for the mistakes made. Related to temperature sensing the CEF21 has a temperature sensor tucked inside each negative duraccell right where it touches the battery and far away from heat generating components in the power supply.

I’m glad we’ve converged.

After I charged a Hybriloop up to 1. I would practice on some scrap board with surface mount components first, though. Fun with image manipulation While I wait to get the parts to modify the charger, I was having trouble following the traces on the dual-sided board where they duck through to the other side.


Take a look at the marked up board below: Please assign your manual to a product: Add to watch list Remove from watch list.

It might be an idea to monitor the voltage across “the resistor” when charging a AA battery and also when charging an AAA battery to validate some of the above assumptions about the current traversing it.

duracell cef21 Questions & Answers (with Pictures) – Fixya

Originally Posted by Mr Happy. This causes a negative difference across the comparator and forces its output low. As useful cdf21 it is, this charger is not without flaws.

This is very puzzling. It allows you to plug ipods or other USB-powered devices into the charger to be charged. Select a valid country. Estimated on or before Tue. Maybe the circuit senses the voltage across those resistors? The only other small flaw is that the 4 AA batteries included with this charger are rated at mAH. Even though finding the charger, something I Aarrgh, let’s call the duracelp thing off! For the charging bank nearest the test connector, a trace runs along the top view duraacell the middle of the board.