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2013-08-16, 09:29
This can be a very tricky project. The only way I know of to test capacity is to discharge the battery with a steady draw and time it.
Less reliable, but still fairly accurate would be to discharge a battery completely and charge it with a known steady current and time it. But it's difficult to know exactly what current is being received. Your charger may say 500mA and that may be what it's putting out, but 500mA may not be what the battery is actually receiving /accepting. I've got a tickle in my brain about being able to monitor incoming mA through an engineering mode, but it's lost in the fog right now.
Less reliable, but still fairly accurate would be to discharge a battery completely and charge it with a known steady current and time it. But it's difficult to know exactly what current is being received. Your charger may say 500mA and that may be what it's putting out, but 500mA may not be what the battery is actually receiving /accepting. I've got a tickle in my brain about being able to monitor incoming mA through an engineering mode, but it's lost in the fog right now.
Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth