A system and method for information preservation on a portable electronic
device. A signal indicating an energy capacity threshold remaining in the
battery of a hand held device may be generated. Then, responsive to such
a signal, information may be copied from a volatile memory into a
non-volatile memory. The non-volatile memory may be configured to provide
instructions for direct execution by a processor, or the non-volatile
storage may be attached via an expansion interface. The non-volatile
memory may be a removable card. The copy function is typically done in
low power modes. Alternatively, the information is only copied provided
sufficient battery capacity remains to perform the copy function.