It all just depends on what you mean by "without new maps". If you still have the old maps (around 66 or so tiles), then yes, that 922 would be plenty for moving the dish around. However, if all you have is what's left after a master reset... then it could be a little skimpy. After a MR, you're looking at around 21 or so tiles. That might be enough, and it might not.
If the UID is still in tact (along with that new battery), then I would consider new maps. Personally, I use a 922 with new maps that I modified myself with a scheme that I always wanted to see in the 4DTV. Between work that the Map Master Restore put in, plus my own little touch... I'm pretty happy with it. A lot happier than if I was still using the old big M maps.
Cheers