Cmos bios assembly battery (RTC Battery) are for Lenovo Lenovo Thinkpad Ultrabook X250 X260 models that use oem # CR1632/S7AE Cmos bios assembly battery (RTC Battery) is a cable harnessed 2 pin plug integration that is the power source to the rtc circuit enabling the motherboard to retain it's default settings ei: date, time and boot sequence. The renewal or replacement process might be something that can be somewhat challenging depending on the specific model of notebook, yet in most cases technical manuals will allow the scope of it's replacement process and allow owners to replace and renew the cmos battery. If in doubt, please ask us to assist or redirect you to that source help.
