What is a CMOS Battery? How to Remove and Replace in a Laptop
You know that your PC has a real time clock, but how does it work?
Nonvolatile BIOS memory - Wikipedia
HP 430863-001 Motherboard (system board) - Defeatured (DF) - Includes PC Card / ExpressCard assembly - Does not include RTC (Real Time Clock) battery - For nx6315 models - Walmart.com
Changing a BIOS Battery - Lennox ITLennox IT
Nonvolatile BIOS memory - Wikipedia
HP 319603-001 - 3.3 VDC Lithium Coin Real Time Clock (RTC) CMOS Battery for HP Proliant Servers - CPU Medics
Debian and system clock change? - Unix & Linux Stack Exchange
Replace the Real Time Clock (System) Battery - Sun Server X4-8 Service Manual