ML-1220 CMOS BIOS battery for

Dell W6NPD is an ASSY Battery Reserve Coin Cell for laptop CMOS and BIOS backup. OEM reference 0W6NPD, it helps maintain system settings and clock functionality when the primary battery is removed or drained.

The cell is ML-1220, rated at 3 V. It serves as a reserve for stored system information when the laptop’s main rechargeable battery is unavailable.

The listed compatible families are Dell Latitude, XPS, Precision and Inspiron. This battery is intended for the CMOS or BIOS backup function in supported Dell laptops.