Exclusive Savvy Circle Insider Information. Duracell: Power your favourite devices in less time. Page 3 With this Duracell charger you can be sure that no matter when, where, or what, these Did you know? After a single charge in this Duracell charger, your batteries will remain charged for 6 months when not in use. Each charger delivers a super quick charge, ensuring you have 2 AA batteries ready in 45 minutes.
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Re: Duracell CEF21 disassembled modifications, anyone? Originally Posted by Mr Happy I think there is a similar situation with the AAA connections: a current supply through the resistor from the AA pad and a sensing trace leading away. Maybe the circuit senses the voltage across those resistors? Nice Sunday morning project There is a style of current source derived from a floating reference voltage that is used in LM78xx type voltage regulators.
For the above to hold true in the "fuel gauge" charger, this voltage would correspond to about 93mV and a resistor of about 0.
The 0. For the bottom charging bank nearest the test connnector , I see a trace going up from the AA pad and another one going up from the AAA pad that I think you refer to as the "sense" traces. For these to serve this function, they would have to be traced back to the same point on the IC chip. On the bottom view, they seem to do converge toward the middle of the board but then the resolution does not hold up.
A high res shot would be useful here. Question: On the top side around the coils glued on the top side are two components marked Z3 and Z4 on the board.
This would indicate that they are zener diodes but could they be those 0. A picture would be useful. Experiment: You mentioned that putting a short across the resistor might be one way to boost the current. A half step would be to put a 1 ohm in parallel held in place by your hand with the 0. If the above ideas hold, then the current should increase to about mA. Note, somebody here suggested a way to use an folded aluminum foil 8 folds used to form a sandwhich of foil-paper-foil that can be used break the connections of a battery while sitting in a charger to provide two attach points foil for inserting an ammeter.
Duracell Charger Handbook
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