The TR-632 is a lightweight, high capacity, lithium-ion battery pack for TR-600 series PAPRs. It charges quickly and features a charge level indicator. When equipped with a new high capacity battery (TR 632) and new filter, the TR-600 PAPR assembly has a run time of 8-18 hours. PAPR runtime will vary based on battery age, filter loading, filter or cartridge selection, and user selected air flow setting. Under equivalent conditions, the TR-632 high capacity battery provides extended PAPR run time when compared to the TR-630 standard capacity battery. The TR-632 will charge in less than 4 hours.