| 摘要 |
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.
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