Batteries refer to the use of onboard backup power sources in memory devices, particularly nonvolatile static RAM (SRAM) and certain portable devices, to prevent data loss. These batteries, often lithium or lithium cell batteries, are available in snap-in, surface mount, or through-hole configurations and can last up to a decade as power backups. Their primary function is to ensure data retention during power outages or when the main power source is disconnected.
In addition to providing backup power, some nonvolatile SRAMs feature mounting bases for simplified battery replacement. Furthermore, certain nonvolatile SRAMs include a crystal for timekeeping purposes, enabling them to maintain accurate time information in addition to preserving stored data. This integration of backup power and timekeeping capabilities ensures uninterrupted operation and reliable data retention in nonvolatile SRAMs and compatible portable devices.
