Sorry, I gave the wrong chemistry. The carbon-chloride battery is labeled as "heavy-duty," because it has greater capacity than the carbon-zinc battery ("gener

Sorry, I gave the wrong chemistry. The carbon-chloride battery is labeled as "heavy-duty," because it has greater capacity than the carbon-zinc battery ("general-purpose"). When alkaline batteries were invented, the older chemistry continued to be sold as heavy-duty. This leads to the strange situation where the heavy-duty battery has less capacity than the other batteries you find on the shelf.