A modularized universal jacket for a personal digital assistant is described.
The
jacket includes a housing consisting of an upper shell and a lower shell for enclosing
to define a first section, a second section and a third section, and three modules
respectively mounted in the three sections and electrically connected to each other
and an adapting board coupled on the housing. Furthermore, each of the modules
can be replaced according to instructions, or predetermined or upgrade needs, and
the modules can be a battery module, a wireless module and a main circuit board
module, respectively.