WELCH ALLYN CP150 ECG MACHINE BATTERY (BATT99). Welch Allyn 11.1 V Lithium-Ion Battery Pack (9-Cell) for Connex Spot Accessory Power Management Stand, Connex Vital Signs Monitor and CP150 Electrocardiograph. Note: This battery currently can not ship via air shipment methods (ground shipment only). Warranty: TWO YEAR WARRANTY from manufacturer. Price per each.