A flashlight includes a main body, a power source supported within the main body, a first electrical contact supported by the main body and electrically connected to the power source, and a head removably coupled to the main body. The head includes a light source, a lens, and a sliding focus mechanism axially moveable to adjust a distance between the light source and the lens. The flashlight further includes a second electrical contact supported by the head and electrically connected to the light source, a main body bayonet portion supporting the first electrical contact, and a head bayonet portion supporting the second electrical contact and engaged with the main body bayonet portion to electrically connect the first electrical contact with the second electrical contact.