Quote:
Originally Posted by TonyDuell
I was always told it was a bad idea to attempt to charge primary cells, in this case probably of the zinc-carbon type.
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Something of a myth.
They can be recharged - sort of - and it was all the rage quite some years ago with units on the market to do just that.
The sort of part is that for a start, the battery must not be too discharged, the charging voltage works best if it is dirty (ie unsmoothed) and the downside is it can only be done a few times.
So I would say that if the main supply is not significantly above the voltage of a new set of batteries, it would tend to be OK.