I believe you have heard of the function of Ram. The data in the Ram will be lost if the equipment power is turned off. This is different for the latest innovation from Fujitsu which is the FRAM. FRAM stands for Ferroelectric Ram and it can retain data without data backup battery. FRAM is a type of non volatile memory, that use ferroelectric film as a capacitor to store data.
This ferroelectric film is polarized by the electric field applied from an external source and remains polarized even with the external electric filed removed. The FRAM can be used on 3-phase power meter, Industrial meters, Automatic Meter reading (AMR), Industrial Process control, Post machine ATM and Office Automation machine.