NVRAM(Non-Volatile Random Access Memory) is one of non-volatile memory selections. This may be alternative to EEPROM back up memory. NVRAM chips can be used for nonvolatile memory storage with many benefits comparing to EEPROM. Main benefit is that NVRAM chips work like static RAM. Actually they are RAM just they contain lithium cell battery for retaining RAM contents when main power is switched off. The backup memory can store contents as long as battery provides power. NVRAM chips doesn’t require much power, backup can be guaranteed for up to ten years. For instance lets take Dallas NVRAM chip DS1225. It contains 64k(8k x 8) of RAM memory.