If the battery is not locking into position, perform the following simple procedure:
Replacement Caution: It is not necessary to remove any of these screws during this procedure. If you do remove them, the two long screws go in the outside holes on the front edge. Installing them in any of the other screw holes could cause the screws to push through the plastics or cause the plastic to dimple.
Note: Macintosh PowerBook G3 Series computers should not be confused with Macintosh PowerBook G3 computers. Though the names are similar, there are significant differences. For more information differentiating between the computers, read article 24604: "PowerBook G3, G3 Series: Identifying Different Versions"