Welch Allyn, Inc., Life2000 Ventilation System, REF BT-20-0002A
There is an issue with the ventilator battery charger that could lead to an audible and visual alarm. If the alarm is engaged, the ventilator becomes inoperable.
US, Nationwide Distribution
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-0885-2025