Which HP utility must you run before replacing a notebook battery under warranty?

The HP utility that must be run before replacing a notebook battery under warranty is HP Battery Check. This utility performs a diagnostic assessment of the battery's health and condition, allowing technicians to determine whether the battery is functioning properly or if it is indeed defective and eligible for replacement under warranty.

Running this utility is essential because it ensures that any issues related to the notebook's power source are accurately diagnosed before proceeding with a warranty claim. Battery issues could sometimes be related to power management settings or other software configurations, and HP Battery Check helps identify those issues.

The other utilities mentioned do serve specific diagnostic purposes, but they do not directly focus on validating the battery's condition and whether it meets the criteria for a warranty replacement. Therefore, HP Battery Check is the appropriate choice in this scenario for assessing battery health prior to replacement.