A blister package (12) of transparent plastics material having an actuation portion (18), an electrical device such as a flashlight (14) with a slider switch (32) disposed at least partially within the package, the device including a battery power source (22) and an activatable component such as a LED or light; and a package switch (46) with actuation element (66) having an activation condition and a deactivation condition and being changeable from its deactivation condition to its activation condition. The package and device combination being configured for the power source to form part of a closed electrical circuit with, and to activate, the activatable component when the package switch is in its activation condition, and for the circuit to be open once the package switch has changed to its deactivation condition. The consumer can test the operation of the packaged flashlight by operating the switch (46) to illuminate either the LED (24) or the fluorescent tube (26).