The HP L03258-001 RTC battery is a replacement component for the real-time clock in compatible HP laptops. The listing identifies it as a CR2032 lithium battery, giving a clear reference for this particular part.
It is listed for HP ZBook x2 G4 configurations. Intended for the RTC, this part serves a different role from a laptop’s main battery. Its exact HP part number helps distinguish it when identifying the required clock-battery component.