Lenovo 5B11M81200 is a BATTERY FRU RTC battery for the real-time clock function in a compatible notebook. Its part number identifies this specific Lenovo service component, and the listing also associates it with TOSHIBA.
The specified cell is a lithium CR2016 button battery, a compact format used for the RTC role in notebook equipment. It is categorized as a Lenovo notebook battery. This RTC component serves a different purpose from the main rechargeable battery that powers normal notebook operation.
Use the FRU number to identify the part when servicing a system that calls for this particular RTC battery. The available information establishes its part identity and cell format, but does not confirm compatibility with specific notebook models.
