Final answer:
To replace a digital camera battery, first locate the battery compartment, remove the old batteries while noting any directional markers for correct replacement, and ensure the camera is off during the process.
Step-by-step explanation:
The first thing to do when changing the battery or refueling in this context, likely refers to replacing the battery in a digital camera, as refueling does not typically apply to cameras. Before replacing the battery, it's crucial to locate your digital camera's battery compartment, then safely remove the battery pack or batteries.
While doing this, take note of any directional markings or tabs inside the compartment, as these are incredibly important for proper reinsertion of the batteries. Always ensure that the camera is turned off before attempting any removal to avoid damage or corruption of memory.