"Battery" is the opening track of Metallica's 1986 album Master of Puppets. As with the opening track from Ride the Lightning, Battery begins with a slow, clean guitar part. In this case, as many as five acoustic guitars are layered harmonically before the drums and bass come in with distorted guitars playing a more melodic version of the acoustic part. This lasts until 1:06, when the guitars cut into a very fast minimalist thrash metal riff that is the basis for the rest of the song. .