Question: how to connect airpods to cellular apple watch?
Answer: On your ‌Apple Watch‌, swipe up from the bottom of the screen to bring up the Control Center. (If you're in an app, touch and hold the bottom edge of the screen, then drag up the Control Center pane with your finger.)
Tap the AirPlay icon (the small triangle with concentric circles on top).
Tap ‌AirPods‌.