Hi everyone! I basically understand how the materials used in the chemical reaction of a battery work but now I want to know why some batteries have different ratings of voltage. From what I've read, this depends on the materials that are used. What does it mean for some materials to do more work on the charges in the battery? Does this just mean that the chemicals are talking more electrons from the cathode and supplying more electrons for the anode? I guess my real question is what is the difference between a 1.5v battery and a 1.25v battery? I'm not looking for a short answer like "It's just the materials used in the battery." I'm looking for an answer of how those materials affect the charges and how that affects the voltage and how the "chemistry" of the battery affects the "physics" of the battery. Thanks for all your help!