Battery for real-time clock (RTC) - CR2032 button style, 3VDC, lithium
HP 449729-001, Single-use battery, CR2032, Lithium, 3 V, 1 pc(s), 225 mAh
HP 449729-001. Battery type: Single-use battery, Battery size(s): CR2032, Battery technology: Lithium. Battery form factor: Button/coin