Which action should NOT be taken during a visual inspection of electrical equipment?

During a visual inspection of electrical equipment, checking the battery charge is not a visual action, as it typically requires a multimeter or battery tester to measure voltage or charge levels. Visual inspections primarily focus on observable conditions such as physical damage, wear, or looseness, which can be assessed by looking at the components. For instance, inspecting for frayed wires, looking for loose hardware, and examining connector contacts can all be done by visually examining the equipment and do not require special tools for assessment. The other actions mentioned involve assessing the physical integrity and connectivity of electrical components, which are critical aspects of ensuring safety and functionality during inspections.