NiMH 1.2V charger

You dont have any cats in Spain?

-- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85.

Michael A. Terrell Central Florida

Nope. The C/10 current won't damage the battery when limited to 14 hours by the appliance timer, even if it is applied to a cell that is close to fully charged for the full 14 hours.

And this is not a "timer based charger" - it is current based, with the timer to "idiot proof" it against people who put a cell in a charger and forget to take it out. 'Course if they leave it in there for months it can self-discharge, which is why I also mentione the "forever rate".

Ed

Some people will tell you what they think. Let me show the facts for you to think. The charging current is nothing more than breaking down the H2O into Hydrogen and Oxygen. By definition, the cell is fully charged when it's no longer able to hold Hydrogen generated at the anode. All things being equal, Hydrogen is continuously generated at the same rate. The difference being that it is no longer chemically absorbed, but mechanically held in the cell. The pressure will build up and raise the temperature. The cathode (bigger outer cell) usually can hold more oxygen, so that is not a problem. At certain point, the Hydrogen will vent out of the cell. Lacking components for recombinations, the cell dry-out.

Now, tell me why 0.1C overcharging is not a problem.

"linnix" schrieb im Newsbeitrag news: snipped-for-privacy@h40g2000cwb.googlegroups.com...

The chemical reactions have a great dependence of temperature and pressure.

- Henry

--

Assuming that it is charge/discharge in the same manner (same temperature), the lack of Hydrogen will lower the capacity. Depending on the specific battery, once the Hydrogen is vented, the cell is not in the same condition any more.

"linnix" schrieb im Newsbeitrag news: snipped-for-privacy@n51g2000cwc.googlegroups.com...

pressure.

Yes. Overloading opens the valve. Sligthly overloading is reversible as the gas recombine with the help of an catalysator. Varta makes a cell where loading is controlled with an internal pressure sensor.

- Henry

You need to learn the facts before you can show them.

See page 19 of the Energizer Application manual

Ed

I have a 4x1 cell Eveready that I hate. For reasons not explained, it does not like some cells and just goes to "BAD" mode [blinking]. Sometimes you can fool it into starting, and then it's OK for a full charge.

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