The song was written by Prince for Vanity 6 back in 1983. It was intended to appear on the second Vanity 6 album timed to release around the same time as the movie Purple Rain.
Vanity (the singer) and Prince ended their romantic relationship around this time. She was also unhappy with her royalties and pay. So she decided to leave the group and not to participate in the Purple Rain movie. The album and the song were shelved and never officially released.
The rather long track is a tribute to a battery-powered sex toy. The narrator (Vanity) reaches for her vibrator. When the batteries run out, she goes to a store and encounters a clerk, who offers to “carry it downstairs” and install new batteries. The narrator then takes the device to a different store, where she meets a cashier (Prince in his Jamie Starr accent). The cashier gives her the batteries and sends her out of the door.
The song concludes with the narrator achieving orgasm. Nice. I can only imagine what Tipper Gore would have said.
This demo leaked long ago. So far every example that I have found includes the sound of cassette tape hiss. They are from a cassette with a rough mix demo that Prince handed out in limited number. The example that appears on soundcloud is someone’s remaster of the track.
It is unclear if Prince’s Estate will release this song in the future. Vanity sadly passed away in 2016, the same year Prince died.