A GUITAR PLAYER WOOS THE SHARKS WITH A SONG, AND A SAFE BUT UNUSUAL WAY TO CREATE A SMARTPHONE BATTERY CHARGER OUT OF FIRE & WATER, ON SHARK TANK

"Episode 524" - A guitar player from Dallas, TX hopes to sing his way into a deal for his service that helps people find and hire music instructors; a firefighter from San Diego, CA has come up with a simple way to stop costly, accidental fire sprinkler activations; two friends from Salt Lake City, UT show how they can turn fire and water into a battery charger; and the outside-the-box thinking of two men from San Francisco, CA could result in a deal for their all-inclusive project kits in a box. In a follow up segment, Tiffany Krumins from Auburn, GA and creator of Ava the Elephant medicine dispenser gives an update on her business, which Barbara invested in during Season One, on "Shark Tank," FRIDAY, APRIL 11 (9:00-10:01 p.m., ET) on the ABC Television Network.

The Sharks in this episode of "Shark Tank" are Mark Cuban, Lori Greiner, Robert Herjavec, Daymond John and Kevin O'Leary.

"Shark Tank" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with stereo sound. This program carries a TV-PG parental guideline.

For more information on "Shark Tank," visit ABC.com.