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Small silver coin-cell battery with wire leads and connector

DELL

DELL CMOS BIOS RTC Battery W6NPD ML-1220 3V

SKU CH-E6X9-3B7RP

Genuine Dell OEM ML-1220 3V CMOS RTC battery compatible with Inspiron 7490, Latitude 7350, 5175, 5285, 5289, 5290, 7275, 7285, 7400, XPS 9343, 9250, 9350, 9360, 9550, 9560, 9365, 9370, 9570, 9380.

  • Typelaptop-computer-batteries
  • Genuine Dell OEM part ensures exact fit and reliable timekeeping
  • 3 V ML-1220 chemistry maintains system clock during power loss
  • Compatible with XPS 13 9343, 9350, 9360, 9370, 9380 and XPS 15 9550, 9560, 9570
  • Supports Latitude 7350, 7275, 5285, 5289, 7285, 7400, 5290 2-in-1 models
  • Works with Precision 5510, 5520, 5530 and Inspiron 7490

Genuine Dell OEM ML-1220 CMOS battery

This genuine Dell OEM CMOS RTC battery uses the ML-1220 cell at 3V and carries part number W6NPD. It maintains the real-time clock and BIOS settings when the main battery is removed or depleted. The component is a direct replacement for the original coin cell fitted at the factory.

Fits listed Dell ultraportable

The battery is compatible with Inspiron 7490, Latitude 11 5175 2-in-1, Latitude 12 7275, Latitude 13 7350 2-in-1, Latitude 5285, 5289, 5290, 7285 and 7400 2-in-1 units, XPS 12 9250, XPS 13 9343, 9350, 9360, 9365, 9370, 9380, 7390, XPS 15 9550, 9560, 9570, 7590 and Precision 5510, 5520, 5530. Installation requires opening the chassis and access to the system board header; no additional cables or adapters are needed.

Passive component with negligible power draw

The ML-1220 cell draws only microamps to keep the RTC running, so it adds no measurable heat or noise to the system. Typical service life spans several years under normal use, after which the clock may drift or BIOS settings reset, signalling replacement. The 3V lithium chemistry is stable across the operating temperature range of the supported laptops.

Highlights

  • Genuine Dell OEM part ensures exact fit and reliable timekeeping
  • 3 V ML-1220 chemistry maintains system clock during power loss
  • Compatible with XPS 13 9343, 9350, 9360, 9370, 9380 and XPS 15 9550, 9560, 9570
  • Supports Latitude 7350, 7275, 5285, 5289, 7285, 7400, 5290 2-in-1 models
  • Works with Precision 5510, 5520, 5530 and Inspiron 7490

Specifications

BrandDELL
Typelaptop-computer-batteries

Questions about this item

How long does the ML-1220 3V battery keep the real-time clock running when the laptop is off?

The ML-1220 3V coin cell typically maintains the RTC for several years under normal standby conditions.

Does the W6NPD battery generate noticeable heat or noise during continuous operation?

No, the ML-1220 coin cell is passive and produces no audible noise or measurable heat while installed.

Which Dell models is the W6NPD CMOS battery confirmed compatible with?

It fits Inspiron 7490, Latitude 7350, 7275, 5285, 5289, 7285, 7400, 5290, XPS 9343, 9250, 9350, 9550, 9360, 9560, 9365, 9370, 9570, 9380, 7590, 7390, Precision 5510, 5520, 5530.

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