HP EliteBook X360 830 CR2016 CMOS Replacement Battery 3V 75mAh

HP EliteBook X360 830 — 3V Lithium Replacement Battery (CR2016-2P)

This is a CR2016 lithium coin cell rated at 3V and 75mAh. It replaces the CMOS backup battery on the HP EliteBook X360 830 motherboard. This cell powers the RTC circuit and SRAM that hold BIOS settings and clock data when the laptop is fully powered off or disconnected from mains.

• EliteBook X360 830 CMOS socket fit: The X360 830 uses a two-pin connector harness rather than a bare coin cell slot. Part number CR2016-2P matches that harness — the coin cell ships with the correct lead and connector already attached, so it seats directly onto the motherboard header without modification.
• Bench tested on actual hardware: We tested retention voltage under no-load conditions and confirmed the cell holds above the 2.8V minimum required for CMOS SRAM retention. The BMS is not applicable here — this is a non-rechargeable primary cell with no charge circuitry.
• Post-install BIOS step: After installing the new cell, enter BIOS setup immediately and manually set the correct date and time, then save and exit. The RTC circuit resets to a factory default value after any coin cell swap — the correct time must be written back before the system will maintain it.

BIOS clock resetting to 2000 after every power cycle on the X360 830

The RTC on the X360 830 is backed entirely by the coin cell once mains power is removed. When the cell drops below approximately 2.8V, it can no longer hold the charge the SRAM needs to retain time data. The clock does not drift — it snaps back to a default year, typically 2000 or 1970, on every cold boot. Replacing the CR2016-2P cell and resetting the clock in BIOS resolves this immediately.

CMOS checksum error on boot after fitting a new coin cell

A checksum error on first boot after a coin cell swap is normal — the CMOS SRAM has lost all stored values, so the firmware flags the mismatch between stored and expected checksums. This is not a fault with the new cell. Enter BIOS setup, let the system load defaults, set the correct date and time, then save and exit. The error will not reappear on the next boot provided the new cell is seated firmly and reading above 2.8V.