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Increasing use of button battery (BB) in household products and toys is responsible for the growing incidence of button battery ingestion (BBI). The BBI may cause life‑threatening complications. We present a series of three cases of complicated BBI (lithium cell) with delayed presentation; one of them could not survive due to tracheoesophageal fistula and sepsis. Here, we highlight the importance of early endoscopic intervention and careful follow‑up in children with lithium battery ingestion.