Background The ingestion or insertion of alkaline batteries in the body can cause severe damage to hollow organs. We report here a case of severe vaginal burns in a young patient caused by an alkaline battery. Case A 5-year-old girl presented to our outpatient department with pelvic pain and vaginal discharge. Further workup suggested the presence of a vaginal foreign body. Under general anesthesia, an alkaline battery was removed from her vagina, which showed severe burns with partial-thickness necrosis. Complete healing was confirmed at 3 months after initial presentation. Conclusions In this rare case of an alkaline battery present in the vagina of a prepubescent girl, we discuss the available treatment and management options in comparison to similar previously reported cases.