They will do anything to make their way to the goal. The fans has found them. I think it's about how Metallica's fans are like a battery that gives them energy, and keeps them going. This song I think deals with pride. I like the intro.
Battery has multiple interpretations.
The concerts getting so wild, body guards and railings, etc. I love this motherfucking song. I get this fucking adrenalinerush and moshing all around. And god, the part where Lars is playing with drums at the end. God it gives me energy.