Are the PowerBook G3 Series computers batteries hot-swappable?
If the system is connected to AC power or operating with two batteries, then the batteries can be hot swapped. When using a single battery, the battery should be swapped only when the system is in sleep mode or shut down. Otherwise, the system will crash because you have removed the primary power source. Note: Macintosh PowerBook G3 Series computers should not be confused with Macintosh PowerBook G3 computers. Though the names are similar, there are significant differences.