Replacement battery for Certifier FA Plus Ventilator. Specifications: 2200mAh, 7.4V, Li-ion. Compatible with: Certifier FA Plus Ventilator, Certifier Flow Analyzer Plus Ventilator Test System 4080. Replaces: TSI INC BLI-195, TSI INC B11876. TSI INC replacement battery designed for Medical devices. Designed for long-lasting power.