An Observation on batteries and magnetism
I'm not sure how relevant this is to the discussion but I just noticed this and thought of this message thread. This was observed when I had a container with 12 AA batteries of various types (Eneloop NiMh, Tenergy NiMh and some PowerGenix NiZn) that I sat down near a good quality compass. I noticed the needle moved a bit. So I pulled out the 3 different types of batteries and found all 3 attracted the North end of the compass needle when the positive pole of the battery was held over it. When the negative pole of the battery was held over the needle it deflected the North end. The slightly higher voltage NiZn's had a somewhat stronger push and pull. I also tried some Lithium 3 volt batteries with the same results.
Are batteries weak magnets? I've never noticed them picking up fine particles of metal. I used one of the strongest batteries to see if it would pick up some very tiny metal flakes left over from drilling. I couldn't get even a tiny fleck to stick on either end of the battery.
What is the cause of this effect? Is the compass detecting a small leakage of electrons from one battery pole to the other? A Google search seemed to find nothing but the effect of magnets ON batteries.
In the process of trying to find out about this effect I found that a magnet like a horseshoe type will give a voltage with a piece of paper between it and a metal plate or it's keeper. I got 30 to 45 millivolts with a strong U shaped Neo magnet and it's keeper. So now I've got that magnets are batteries and batteries are magnets
LOL
I'm not sure how relevant this is to the discussion but I just noticed this and thought of this message thread. This was observed when I had a container with 12 AA batteries of various types (Eneloop NiMh, Tenergy NiMh and some PowerGenix NiZn) that I sat down near a good quality compass. I noticed the needle moved a bit. So I pulled out the 3 different types of batteries and found all 3 attracted the North end of the compass needle when the positive pole of the battery was held over it. When the negative pole of the battery was held over the needle it deflected the North end. The slightly higher voltage NiZn's had a somewhat stronger push and pull. I also tried some Lithium 3 volt batteries with the same results.
Are batteries weak magnets? I've never noticed them picking up fine particles of metal. I used one of the strongest batteries to see if it would pick up some very tiny metal flakes left over from drilling. I couldn't get even a tiny fleck to stick on either end of the battery.
What is the cause of this effect? Is the compass detecting a small leakage of electrons from one battery pole to the other? A Google search seemed to find nothing but the effect of magnets ON batteries.
In the process of trying to find out about this effect I found that a magnet like a horseshoe type will give a voltage with a piece of paper between it and a metal plate or it's keeper. I got 30 to 45 millivolts with a strong U shaped Neo magnet and it's keeper. So now I've got that magnets are batteries and batteries are magnets
LOL

I must be nuts , now that is out of the way ...
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