Answer
Aug 20, 2025 - 09:33 AM
The letters on a battery typically indicate its size and type, which are standardized by organizations like the International Electrotechnical Commission (IEC). For example, in AA, AAA, C, and D batteries, the letters refer to different physical sizes. In rechargeable batteries, additional letters like "NiMH" or "Li-ion" indicate the chemical composition, such as nickel-metal hydride or lithium-ion, respectively.
