SQL Service Password Change in AlwaysOn Setup

HI,

We have a 4 node AlwaysOn cluster with 4 databases (and 4 AGs), and we need to change the password of the SQL Service Account. Would it be a good idea to -

• Failover all the 4 AGs to 2 of the nodes (maybe with 2 DBs primary each) , making them Primary, 
• Update the now Secondary Nodes' passwords and restart the services
• Failover all 4 AGs to the Password updated Servers
• Change the password and restart the services

Effort is to do it with minimum impact.

Any ideas?

Thanks!

Thanks very much, Manoj Deshpande.