They should both have batteries installed. I've had my ProPointer for almost a year and have only replaced the battery once....
I typically stick with Duracell or Energizer...
A tip: If your target is close to the surface, within a couple of inches... Pinpoint with the detector and then take the ProPointer and stick it to the approximate pinpointed location to verify. If you get a chirp, you are on target. If you don't, try moving it around to see if you get a signal. This will help you learn pinpointing with the AT Pro.
Good luck and have fun!
Dwight