SPS-RTC BATTERY

The HP 826388-001 is a lithium coin battery for a computer’s real-time clock, also called RTC or CMOS. It supplies backup power to the clock and related motherboard settings when the computer is disconnected from its normal power source.

Rated at 3 V and 250 mAh, with listed dimensions of 20 mm × 3.1 mm, this is the specified 826388-001 part. The measurements help distinguish it from other RTC battery assemblies.

The listing identifies it for HP motherboards and names HP notebooks, desktop computers and ProLiant servers as compatible systems. It is an internal replacement component for systems designed for this RTC battery, not a general-purpose laptop power battery.