Primary-battery refresher

There has always been doubt about the claims that dry alkaline manganese batteries could be revived by charging, especially since manufacturers warn that attempts at doing so might result in the battery exploding. However, several units of which it is claimed that they can regenerate dry alkaline manganese batteries have now been on the market for weil around years. Advertisements claim that these units can breathe new life into used dry batteries. We had our doubts about these claims and decided therefore to investigate them. The results are described in this article. The article is aimed at experimentalists rather than the average DIY enthusiast.