Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Total 30000
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Hazardous Material Violation
General Maintenance Action
Human Factors; Procedure
After deplaning in ZZZ the gate agent informed my First Officer that a passenger had a lithium battery in his carry-on bag which had been placed in the baggage compartment. I'm guessing that it was a smart bag that was found by the baggage handlers when unloading. They took pictures and informed the gate agent. She told the First Officer who then informed me about the situation. I talked to the agent who told me that the passenger said he 'forgot' about the battery. She forwarded her report to customer service.
Air Carrier Captain reported passenger gate checked bag containing lithium ion battery was transported in the cargo compartment in violation of HAZMAT regulations.