Experience no frustration when you load up your toy with Doc Johnsonft.s long-lasting Alkaline batteries. Extra power and extra life, these batteries pack a punch. Get the batteries that will go as long as you will, and be ready for round two, three or four. Let the good times roll and never be left hanging with dead batteries again! Designed to Power Even the Strongest Vibrators Reliable and Long Lasting Long Shelf Life Suitable for Any AA-Battery-Powered Device