The Surface Dial earns a 4 out of 10 on our repairability scale (10 is easiest to repair):

You can swap in ordinary rechargeable AAA batteries in seconds with no tools.

While it is durable, and repairs are unlikely, the components most likely to fail can't be replaced without damaging the device.

Haptic vibration motor is cemented down with some spectacularly tough glue.

You won't be servicing anything here without a guide and courage enough to drill out the plastic plug guarding the single, well-hidden access point.