[Skip to Content]
[Skip to Content Landing]
October 9, 1909

Method of Increasing the Efficiency and Life of the Dry-Cell Battery

Author Affiliations

Keokuk, Iowa.

JAMA. 1909;LIII(15):1205. doi:10.1001/jama.1909.02550150061013

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


To the Editor:  —Some years ago I began to seek for some method of increasing the life and efficiency of dry cells. I at first employed the usual methods (potassium permanganate and sal ammoniac solutions, etc.). These proving unsatisfactory, I at last hit on the following simple but cheap and satisfactory method:When my dry battery has become exhausted, I take an ordinary ⅜-inch drill-bit of sufficient length and drill a hole as near as possible to the carbon and between the carbon and the outside zinc covering. This hole should reach to within I inch of the bottom of the cell, beginning, of course, at the top or sealed part of the battery. I shake out of the cell all loose dust and particles, and place in this hole a 1½-ounce glass funnel, having a stem not less than 1% inches in length, and of sufficient thickness to fit

First Page Preview View Large
First page PDF preview
First page PDF preview