Directive 2011/65/EU defines EEE as equipment that depends on electric currents or electromagnetic fields to work properly, or equipment for generating, transferring, or measuring those currents and fields, within the Directive's voltage limits. The Directive also defines dependent as needing electricity or electromagnetic fields to fulfil at least one intended function.
The Commission FAQ explains the practical effect: an intended, integrated electric function can bring the whole product into scope even when electricity is not the main energy source. Its examples include a gas cooker with an electrical clock, a singing teddy bear, lighted sports shoes, and petrol-powered equipment with electric ignition. These examples are guidance, not new legal categories.
If the electric part is separable and fully functional on its own, document whether the marketed item is the electric equipment alone or a combined product. The FAQ's wardrobe example treats separable, independently usable lighting as EEE while the furniture remains outside scope. A power tool is different because its detachable electric and non-electric parts work as one integrated item.