NVRAM(Non-Volatile Random Access Memory) is one of the non-volatile memory selections. This may be an alternative to EEPROM to back up the memory. NVRAM chips can be used for nonvolatile memory storage with many benefits comparing to EEPROM. The main benefit is that NVRAM chips work like static RAM. They are RAM; they contain a lithium cell battery for retaining RAM contents when the main power is switched off. The backup memory can store contents as long as the battery provides power. NVRAM chips don’t require much power; backup can be guaranteed for up to ten years. For instance lets take Dallas NVRAM chip DS1225.