BYD is engaged in the research, development, manufacture, and distribution of automobiles, secondary rechargeable batteries, and mobile phone components.

The company operates its businesses primarily through its secondary rechargeable battery business that provides lithium-ion batteries and nickel batteries which are applied in mobile phones, digital cameras, electric tools, electric toys, and other portable electronic devices; mobile phone components and assembly businesses which offer casings, keypads, liquid crystal display (LCD) modules, cameras, flexible circuit boards, chargers, and mobile phone design and assembly services; and automobile business which provides automobiles, including G6, S6, and other series.