Two hours per battery, which I thought was particularly fast. I picked up my shiny new D70 thinking I was in for 8 hours of painful waiting. Then I hook it up, start reading and realised I was off and running in two hours - that's a bit bonus for impatient people like me.
Both my new batteries registered as at least half charged, and still took the full two hours to charge (give or take 10 minutes).
Now that they're charged I can't imagine why I'll need two. The first battery is still registering full charge, and I've been using it heaps.