What is necessary for a vehicle's battery to comply with standards?

For a vehicle's battery to comply with standards, it is essential that it is securely fastened. This is crucial because a properly secured battery helps prevent movement during operation, which can lead to physical damage to the battery or surrounding components. Additionally, a battery that is not secured can create a risk of short-circuiting, which poses safety hazards, such as fire or electrical failure.

Having the battery correctly secured also ensures that the electrical connections remain intact and functioning as intended. If the battery were to shift or become loose, it could disrupt the flow of electricity needed to power the vehicle's systems, affecting everything from engine performance to safety features.

While other factors like being under the hood, easily accessible for maintenance, or having a decorative cover might contribute to the overall functionality or appearance of the vehicle, they do not directly affect the compliance of the battery with safety and operational standards. The primary concern is securing the battery to maintain safety and reliability.