Does enabling Blood Oxygen (SpO2) Tracking on my watch impact the battery? Yes. However, the power consumption won’t considerably affect your normal usage. Related articles How do I set up Blood Oxygen (SpO2) Tracking on my CZ Smart watch on my Gen2 Touchscreen Smartwatch? What are the tips to effectively measure my Blood Oxygen (SpO2) level? I'm having a problem with the app crashing. What should I do?