External 9V battery packs are not supported for powering the 4030.

• A. True
• B. False
• C. Only with a dedicated adapter
• D. Not specified

Answer: (A)

Power supply compatibility and reliable regulation are what this item tests. The 4030 is designed to run from a specific, tested power source, and the manufacturer states that external 9V battery packs aren’t supported. External 9V packs typically don’t provide a stable, adequately current-capable supply and can drop voltage under load or introduce noise, which can cause erratic behavior or even damage. Because the official guidance prohibits using those packs, the best answer is that external 9V battery packs are not supported for powering the 4030. Use the supported power option specified by the manufacturer to ensure safe, reliable operation.