Yes, that is the right process for replacing the battery. 
We have a VNXe3200 reporting a major issue, although everything seems to be working fine.  In addition to the message in the subject line of this post, I see one other related alert: "The system has experienced one or more major failures, which have significant impact on the system. You need to take immediate action. Check related alerts and fix the underlying problems." How can I access more detailed logs in order to determine the cause of this issue.  I suspect a battery failure, as we've encountered that issue before, but I'm not sure how to confirm it. We are running System Software version: 3.1.14.10199487, one of the earliest versions that no longer requires Adobe Flash support. Thanks!
VNXe3200 - The DPE has faulted because of SP fault