Aggravated battery under Florida Statute § 784.045 is battery that causes great bodily harm, permanent disability, or permanent disfigurement, or is committed with a deadly weapon. It is a second-degree felony carrying up to 15 years in prison and a $10,000 fine, with a 2-year minimum mandatory when a firearm is used. Defenses include self-defense, stand-your-ground immunity motions, causation disputes (pre-existing injuries), and forensic re-examination of injury severity.