Replacement Biomedical Battery for Welch-Allyn 72200 Black Halogen. This NiCd battery has a nominal voltage of 3.6V and a rated capacity of 800mAh. Chemistry: Rechargeable NiCD Nominal Voltage: 3.6v Nominal Capacity: 800mAh Device Manufacturer: Welch-Allyn Application: 71110 Learn more about the ...