Regardless of whether it will work with the 810 I strongly recommend you stay away from the Vector3 pedals. Mine have been utterly unreliable and only caused frustration. Every ride a gamble if it would record power for the entire ride, and/or if the batteries wouldn't suddenly die.
Currently using a Quarq crankset that is in contrast completely reliable.
If you have money burning in your pocket, I really like the Edge 830
comparing Edge 810 vs 830 the 810 should record power, but it's probably too old for the cycling dynamics stuff.