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Rectangular black lithium-ion laptop battery with label showing 40WH 14.8V

Junchi

Junchi XCMRD 40WH 14.8V laptop battery

SKU CH-1NJV-8ZCAX

Replaces Dell Inspiron and Latitude batteries with a 40 Wh, 14.8 V lithium-ion pack

  • Battery TypeLithium-Ion
  • 40 Wh capacity powers Dell Inspiron and Latitude models
  • 8 V lithium-ion chemistry matches original specifications
  • Replaces part numbers 49VTP, 312-1390, 4WY7C and others
  • Fits 14, 15 and 17 inch Inspiron 3000 series laptops
  • Compatible with Latitude 3440, 3540 and Vostro 2421, 2521

Replacement battery for Dell Inspiron and Latitude

This 40WH lithium-ion pack replaces the original XCMRD cell in Dell Inspiron 15 3000 series and Latitude 3440 or 3540 models. It matches the 14.8V voltage and fits the listed part numbers including 49VTP and T1G4M. Owners of compatible Dell laptops can restore mobile runtime with a direct swap. Buyers needing a different voltage or capacity should look elsewhere.

Steady discharge at rated voltage

The lithium-ion chemistry delivers a stable 14.8V output across the discharge cycle rather than a brief peak. Internal protection circuits guard against over-charge, over-discharge and short-circuit during daily use. Consistent voltage helps the laptop maintain clock speeds without throttling. Users who require hot-swap capability or external charging will not find those functions here.

40WH capacity at 14.8V

The single figure that determines fit is the 40 watt-hour rating paired with 14.8V nominal voltage. Only systems designed for this exact energy envelope will report correct charge levels and runtime estimates. Mismatched capacity triggers inaccurate battery meters or unexpected shutdowns. Verify the original battery label shows 40WH and 14.8V before ordering.

Highlights

  • 40 Wh capacity powers Dell Inspiron and Latitude models
  • 8 V lithium-ion chemistry matches original specifications
  • Replaces part numbers 49VTP, 312-1390, 4WY7C and others
  • Fits 14, 15 and 17 inch Inspiron 3000 series laptops
  • Compatible with Latitude 3440, 3540 and Vostro 2421, 2521

Specifications

Battery TypeLithium-Ion

Questions about this item

Does the 40WH lithium-ion pack run hot or draw extra power during long sessions?

The 14.8V 40WH lithium-ion cell matches the original voltage and capacity so thermal load and power draw stay the same as the factory battery.

What must I already own for this XCMRD battery to work?

A Dell Inspiron 15 3521, 3537, 3878, 3541, 3542, 3543, 3531, 15R 5521, 5537, 17 3721, 3737, 17R 5737, 5721, 14 3421, 3442, 3443, 14R 5421, 5437 or Latitude 3440, E3440, 3540, E3540, or Vostro 2421, 2521 that uses part numbers such as 4WY7C, 49VTP or T1G4M.

Will the 14.8V 40WH pack fit the older Inspiron 15 3000 chassis I still use?

Yes, the battery is listed as a direct replacement for every Inspiron 15 3000 model in the compatibility list, so it seats in the original bay without modification.

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