Air Carrier flight attendant reported a Hazmat procedure violation during gate departure. Gate agent neglected to verify that no spare Lithium Ion batteries were in bags that were transferred to cargo compartment due to no available space in the cabin.

Narrative

FA's (Flight Attendants) needed to remove and check 7-8 bags from the aircraft; since we ran out of OHB space. FA's brought the bags to the boarding door. Unfortunately; the Agents did not ask any customer about spare lithium batteries being in their bags; as all the Customers were seated. There were no conversations with any of the passengers and their checked bags and the bags simply were tagged and sent to the ramp. This is not good as this created a safety hazard. Please ensure all Team Members follow procedure; most especially when it pertains to safety-related items and the integrity of the aircraft; as it did in this case. Friendly and continuous reminders are always helpful. In hindsight; I wish I would have informed the Captain about this at the time; but there was a lot going on: we had all these bags saturating the galley; it was near departure time; I had to go brief OWE's (Overwing Emergency Exit); etc. However; I'm not sure if that would have changed anything in the end anyway. I really truly wish we all were aware of procedures and followed procedures even when it might be inconvenient or we miss departure time. It is very difficult and challenging to confront Team Members asking them to follow procedure when we really shouldn't be having to ask them to; we should all know procedure and follow it without question instead of taking the easy way out. I share this with your Team in confidence: I did receive some pushback from a fellow FA when I mentioned asking those 7-8 passengers to go to the boarding door with their bags. I hope this remains confidential. Perhaps this is a good opportunity for us to remind each other of the need to always follow procedure regarding bags that need to be removed from the cabin due to lack of OHB space; most particularly on the A319/320 aircraft where space is always limited. I can't do everything myself :( Thank you for your continued help and support. Please let me know how I can help you as well.