Assess the impact of electrochemical cells on the development of portable electronic devices.

• A. Electrochemical cells have enabled the miniaturization and portability of electronic devices by providing compact and efficient power sources.
• B. Electrochemical cells are primarily used in stationary applications and have little relevance to portable devices.
• C. Electrochemical cells generate power through mechanical energy conversion, which is unsuitable for portable devices.
• D. Electrochemical cells have limited impact on portable electronics due to their large size and inefficiency.

Answer: (A)