The batch file script will be like this.
spsbackup /portal http://pcfbg96049:8222/ /file D:\spsbak\8222.bak /overwrite
spsbackup /portal http://pcfbg96049/ /file d:\spsbak\defa.bak /overwrite
Let me know how your back goes.
My backup stopped after fifteen days.
I dont know the reason but script runs but backup does not happen.