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Rectangular black lithium-ion laptop battery with label showing 11.4V 51WH

KingSener

KingSener 266J9 laptop battery 11.4V 51WH

SKU CH-FY4R-H2PM4 MPN 266J9

Replacement 11.4 V 51 Wh lithium-ion battery compatible with Dell Inspiron 14 5490 and G3, G5 15 series laptops

  • Battery Voltage11.4V
  • Battery Capacity51WH
  • 51 Wh capacity extends runtime on compatible Dell laptops
  • 4 V lithium-ion chemistry matches original specifications
  • Replaces part numbers 266J9 0M4GWP M4GWP 0PN1VN PN1VN
  • Fits Dell G3 15 3590 3500 G5 15 5500 5505 Inspiron 14 5490
  • 100 percent brand new replacement battery with one-year coverage

Replacement battery for Dell G3 G5 Inspiron

This 11.4V 51WH lithium-ion pack replaces part numbers 266J9 0M4GWP M4GWP 0PN1VN PN1VN in Dell G3 15 3590 3500 and G5 15 5500 5505 plus Inspiron 14 5490 models. It is a direct swap for the original three-cell unit supplied new in black.

Verify the original battery before ordering

The same laptops also use a 68WH four-cell variant labelled MV07R so you must check the part number printed on your existing battery. Only order this 51WH version if your current pack shows 266J9 or one of the listed alternate codes.

Normal thermal and power behaviour

The Li-ion cells operate at the standard 11.4V and deliver 51WH of capacity under typical loads. No active cooling is required and the pack runs silently while drawing power within the laptop’s original design envelope.

Highlights

  • 51 Wh capacity extends runtime on compatible Dell laptops
  • 4 V lithium-ion chemistry matches original specifications
  • Replaces part numbers 266J9 0M4GWP M4GWP 0PN1VN PN1VN
  • Fits Dell G3 15 3590 3500 G5 15 5500 5505 Inspiron 14 5490
  • 100 percent brand new replacement battery with one-year coverage

Specifications

BrandLUSONBAY
Model266J9
Part Number266J9 0M4GWP M4GWP 0PN1VN PN1VN
Battery Voltage11.4V
Battery Capacity51WH

Questions about this item

Does the 266J9 battery include any installation tools or cables?

The 266J9 is supplied as the battery unit only; no tools, screws or cables are included in the package.

How do I choose between the 266J9 51Wh and the MV07R 68Wh for my Dell?

Check the part number on your original battery — if it reads 266J9, 0M4GWP, M4GWP, 0PN1VN or PN1VN, select the 51Wh 266J9; if it shows MV07R, choose the 68Wh version instead.

What runtime can I expect from the 11.4V 51Wh rating in a Dell G3 15 3500?

The 51Wh capacity at 11.4V typically delivers several hours of mixed use in a G3 15 3500, though actual time varies with screen brightness, workload and power settings.

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