The battery life of Dyson's cordless vacuums can vary significantly depending on the model and the cleaning mode being used. Generally, most Dyson cordless vacuums offer a battery runtime ranging from approximately 20 minutes on higher power modes to up to 60 minutes when using the Eco mode. For example, Dyson's V15 Detect model can provide up to 60 minutes of fade-free suction on a low power setting, while using it on maximum settings will reduce the runtime significantly. It is important to note that real-world usage may affect battery life due to factors such as surface type, debris level, and different attachments in use. Dyson includes a variety of features and technologies in their vacuums that help optimize battery performance while ensuring efficient cleaning. For specific details and the latest information on individual models, visiting the official Dyson website is highly recommended.