He was born in 1703 or 1704, the son of a vicar, Reverend Edward Battie, in Modbury, Devon. He studied at Eton and King's College, Cambridge. Being unable to afford a legal training he "diverted his attention to physic" and practised for a short time in Cambridge. After practising for many years in the field of psychiatry in London, he acquired two private "madhouses" near St Luke's Hospital for Lunatics, from which he gained a handsome income. His appointment as chief physician at St. Luke's gave him a firm base upon which to consolidate his reputation.