Overview Product Description Welch Allyn BATT11 Battery Voltage: 3.7 Volts Capacity: 2100mAh Chemistry: Li-Ion - Lithium Ion Dimensions: N/A Replacement for: WELCH ALLYN (GRASON-STADLER, PROTOCOL)Connex Pro BP3400 (BATT11, 719028-2) (OEM) Product Videos Custom Field Product Reviews