What Amp-hour ratings do alkaline batteries have?
Bruce Ingle writes the following piece on alkaline batteries based on Duracell’s data sheets: I finally figured out how to get an Ah rating out of the Duracell graphs for 5 alkaline D-cells driving different wattage 6V bulbs. The charts show service hours vs discharge resistance and service hours vs discharge current, so if we do R=V^2/P to get an equivalent resistance for the bulb (using a nominal 6V) and divide it across 5 cells, we get the equivalent resistance/cell. We can then find the expected service life to 4V (.8V/cell) and correspond that to an equivalent constant discharge current using the second chart. By multiplying the service life and equivalent constant discharge amperage, we get the Ah life for the battery at different wattages.
