Alby Hawes

I have a 2004 Landcruiser 4.2TD 5 speed auto. I had the two crank batteries replaced yesterday ... since then on startup it starts revving at about 1100. I put it into drive and it drops down to about 700. I drove it home and pulled into the car port and put it in neutral and it started to idle at the right speed. This morning when it was started it back up to 1100 again ... is this something to do with disconnecting the batteries? Cheer Alby