What evidence is needed for a battery?

What evidence is needed for a battery charge to prove case beyond reasonable doubt includes elements that prosecutor must establish with admissible evidence. For criminal battery under most state laws like Florida Statute 784.03, evidence needed includes proof of intentional touching or striking of another person against their will, that contact was harmful or offensive, and identity of defendant as person who did it. Types of evidence used include victim testimony stating what happened and that they did not consent to contact, eyewitness testimony from bystanders who saw contact, physical evidence like photos of injuries, bruises, red marks, medical records documenting injury, surveillance video showing battery, and police body cam footage. For simple battery, no injury needed, so victim testimony that they were intentionally touched offensively can be enough, such as pushing or slapping. For felony battery causing great bodily harm, prosecutor needs medical evidence of serious injury like broken bones, stitches, or permanent disfigurement. Intent can be inferred from actions. Defendant's statements or admissions also count. Photos of scene, 911 calls, and prior threats can support motive. For self-defense claim, prosecutor must disprove self-defense. So evidence needed is credible testimony plus corroborating physical evidence when available, with victim testimony alone often sufficient for misdemeanor battery if jury believes victim beyond reasonable doubt, while felony requires additional proof of serious injury or weapon use.