how to replace house battery under van

[Sarah]

We are looking for practical advise on how to replace the house battery on 2004 econoline. The battery is mounted under the van on passenger side. If anyone can give us an idea of what to expect when we start to remove the battery cover
and lower the battery it would be appreciated. We will be using a table jack, I think. My husband is actually going to do the work, but he isn't very computer savvy, so I am trying to get any helpful information or advise he could use. Is there already a thread that describes this process? Thanks!