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Re: Battery Testing
someone else correct me if Im mistaken, but I dont think you cant take an instantanious reading on a rechargeable battery that will tell you its full-charge capacity.
The only way I know to do that is to run it through a full charge, discharge cycle, like I described in my first post.
For your idea, if you fully charged the battery, and then measured its internal resistance, that might an indication of how worn out it is. I think you would have to do extensive testing to determine the relationship between the internal resistance of a fully charged battery to its remaining capacity. Also the temperature of the battery would probably be a significant factor for your calculations.
And I think you would have to find that relationship for each size and type of battery you want to check: NiCads, NiMH, LiIon... AA, C, AAA...
it sure would be an interesting project!
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