InfoComm 2019: Adam Hall Group Intros Its Palmer BC400 Modular Battery Chargers for Racks June 19, 2019 | Home / June 19, 2019 rave-video / InfoComm 2019: Adam Hall Group Intros Its Palmer BC400 Modular Battery Chargers for Racks InfoComm 2019: Adam Hall Group Intros Its Palmer BC400 Modular Battery Chargers for Racks