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Black rectangular lithium-ion laptop battery with label showing 7.4V 47Wh

Beisite

Beisite Y9N00 7.4V 47Wh Battery for XPS 12 13 9333

SKU CH-RB9C-NK1BJ

7.4V 47Wh lithium-ion replacement battery for XPS 12 and XPS 13 9333 ultrabooks

  • Battery typeLithium-Ion
  • Battery voltage rating7.4 V
  • Battery capacity47 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor XPS 12 13 9333 Ultrabook 13-L321X 13-L322X Series
  • Restores mobility with a 47Wh lithium-ion cell
  • Delivers stable 7.4V output for consistent performance
  • Replaces OEM parts Y9N00 and 21CP4/55/81-3 directly
  • Fits XPS 12, 13 and 9333 Ultrabook models
  • Brand-new condition backed by 12-month warranty

Replacement Battery for XPS 12 and 13 Ultrabooks

This 47Wh lithium-ion unit is built as a direct replacement for the original Dell XPS 12 9333 and XPS 13 9333 series ultrabooks. It matches the factory voltage of 7.4V and fits the listed part numbers including 21CP4/55/81-3 and Y9N00. Buyers needing a different capacity or a battery for a newer XPS chassis will not find a match here.

Black Lithium-Ion Pack with 12-Month Coverage

The cell chemistry is lithium-ion and the external finish is black, matching the stock appearance of the ultrabook interior. A 12-month warranty period is provided by the manufacturer against defects. Users who require a user-serviceable design with screwless clips or a hot-swappable form factor will not be served by this internal pack.

7.4V 47Wh Capacity Limit for Compatible Models

The energy rating of 47Wh and 7.4V output define the runtime ceiling for the supported XPS 12-L221x, XPS 12-9Q23, XPS 12D-1708 and XPS 13-L321X/L322X systems. The battery cannot exceed this capacity without a physical redesign, so owners expecting extended-life options beyond the original specification must look elsewhere.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $34.99
Pricier than about 62% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameY9N00
Model nameY9N00
Part number21CP4/55/81-3
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating7.4 V
Battery capacity47 Wh
Compatibility
Compatible withFor XPS 12 13 9333 Ultrabook 13-L321X 13-L322X Series

Questions about this item

What voltage and capacity does the 7.4V 47Wh battery deliver to the XPS 12 9333?

The pack supplies 7.4 volts and 47 watt-hours, matching the original specification for the XPS 12 9333 Ultrabook series.

Which screw pattern and connector does the Y9N00 use to fit the XPS 12-L221x chassis?

It reuses the factory screw holes and the original multi-pin connector found on the XPS 12-L221x and 13-L321X models.

How is the battery swapped in the XPS 13 9333, and what step do owners often miss?

Remove the base screws, disconnect the old pack, connect the new Y9N00, then re-secure the base; many forget to re-seat the connector fully before closing the case.

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