What is involved in routine maintenance of battery power units?

Routine maintenance of battery power units involves regular inspections and upkeep to ensure the devices function efficiently and safely. This includes checking for any signs of wear or damage, verifying that connections are secure, and ensuring that the battery is charged properly and maintained according to the manufacturer's specifications.

By performing these routine checks, operators can identify and resolve potential issues before they lead to significant problems, enhancing the longevity and reliability of the battery power unit. Regular maintenance also includes cleaning the terminals and ensuring that the battery is stored in a suitable environment to prevent degradation.

The other options, such as simply recharging the device, storing it without checks, or modifying the design frequently, do not encompass the full scope of necessary maintenance activities and could lead to issues that could compromise performance or safety.