KingSener XCMRD 40WH 14.8V laptop battery for Dell Inspiron 14 15 3421 3521 5421 5521 Vostro 2421 2521

KingSener XCMRD 40WH replacement battery

This 14.8V lithium-ion pack supplies 40WH of capacity for compatible Dell Inspiron 14 and 15 series notebooks including 3421 3521 5421 and 5521 models as well as Vostro 2421 and 2521 units. The cell is manufactured in Korea and the unit ships brand new as a direct replacement for part numbers XCMRD MR90Y XRDW2 YGMTN and 6KP1N.

Check your current battery before ordering

Confirm that the original battery carries the XCMRD part number or one of the listed alternates and that the voltage reads 14.8V on the label. Verify the physical dimensions match the bay in your specific Inspiron 14 15 or Vostro chassis since multiple battery designs exist for these series. Ensure the laptop charges and runs on AC power so the fault is isolated to the battery itself.

Replaces ageing or failed original packs

Swapping a depleted stock battery restores full mobile runtime without requiring a higher-capacity alternative that may not fit. The upgrade is worthwhile when the original cell no longer holds a useful charge or shows swelling but the notebook otherwise meets your needs. Buyers who need longer runtime than 40WH provides or whose model uses a different form factor should look elsewhere.