a 'dead battery' = ('Brit') a 'flat battery' [=a battery that has no more electricity]
The operation was performed by a 'battery' of doctors.
He was found guilty of 'battery'.
(..) Maximus! Maximus! Maximus! Maximus! Maximus! Maximus! Maximus! Maximus! Forward, guards! On battery! Maximus! Maximus! Maximus! Maximus! Maximus! Maximus! Maximus! What am I going (..)2000 Gladiator