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Charging my pigeon magnet batery.


Rob_88
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This depends on the output current of the charger. To work out the charging time you simply divide the capacity of the battery (in Milliamps) which in your case is 7000 milliamps by the output current of your charger. Usually most trickle chargers are about 800 Ma so divide 7000 by 800 and it comes to 8.75 (the .75 meaning three quarters of an hour).

 

Hope that helps.

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Hi guys,

Just a quickie but i'm pretty damm sure its not a good idea to run these type of batteries flat!

Always leave them with some charge in them.

 

Cheers,

 

Brian...

Yes good question, should you leave them fully charged, dead flat or with just a bit of life in them?

 

Cheers, Rob.

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These batteries generally should never be completely flattened. In fact they should ideally be kept as fully charged as they can be.

 

Charging for 10 hours at a charge rate of tenth of full AH capacity won't do any harm. There are batteries specially designed to be run flatter. They are called "deep discharge" or "deep cycle" batteries. Is yours one of these? In any case it is very difficult to determine the state of charge of a battery, particularly in a field.

 

(You could consider the off load terminal voltage taking into account the ambient temperature!) :/:/

 

So you could have a stab at guessing when the rotary is slowing down. This is gradual and difficult to judge.

It is even more difficult to judge if you have a speed controller.

 

In any case you still have to use the sodding thing. So my advice would be use it, but not until the rotary stops turning if possible, take it home ang give it 10-12 hours at (about) a charge rate of tenth of full capacity; 700mA (or 800mA) in your case. In other words it is impossible to treat it perfectly, but a slight overchage is better than running it flat.

 

Or you could buy a three stage charger, but they are v. expensive and still won't address your discharge problem.

 

Cheers Malcolm

Edited by malcolm
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