Commercial Fixed Wing
Situational Awareness
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Procedure
Bag came in as a smart bag with battery still in its slot. I removed the battery as we were unloading and told the Lead to contact a Supervisor. [Supervisor] came out; took pictures and [wrote] the bag tag number down to return the battery to the passenger. The flight came in from ZZZ1 and we [were] told to do a check for the battery before we load the bag onto the [next] plane. I always check smart bags to ensure the safety of our customers.
Air carrier ramp personnel reported that smart bag was mistakenly transported in cargo with battery attached.