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Black rectangular lithium-ion laptop battery with connector cable

NShi

NShi RJ40G 15.2V 63Wh laptop battery

SKU CH-VAY8-EJXP9 MPN RJ40G

15.2V 63Wh lithium-ion replacement battery for Dell Latitude 5420, 5520 and Precision 3560 series

  • Battery TypeLithium Polymer
  • 63Wh capacity extends runtime on compatible Dell laptops
  • 2V lithium-ion chemistry matches original specifications
  • Replaces RJ40G, WY9DX and other Dell part numbers
  • Fits Latitude 5420, 5520 and Precision 3560 series
  • Brand-new condition with Grade A cells for reliable performance

Replacement battery for Dell Latitude and Precision

This 15.2V lithium-ion pack delivers 63Wh of capacity and replaces part numbers RJ40G, 01K2CF, 075X16, WY9DX, 0WK3F1, 0M3KCN and 005R42. It fits Dell Latitude 14 5420, Latitude 15 5520 and Precision 15 3560 series notebooks. The unit ships new and uses Grade A cells for reliable runtime.

Upgrades the lower-capacity 42Wh option

Many Latitude 5420 and 5520 units shipped with a 42Wh WY9DX battery; this 63Wh RJ40G model provides a direct capacity increase when the original part matches the listed part numbers. The jump is worth it only if your laptop currently uses one of the compatible RJ40G or WY9DX part codes and the physical connector matches. Buyers who need a different voltage or a higher-wattage pack should look elsewhere.

Limited to the listed Dell models and part numbers

Compatibility is restricted to the specific Latitude 5420, 5520 and Precision 3560 series chassis that originally used the RJ40G or WY9DX batteries. Connector placement and cable length vary between revisions, so the replacement must be visually confirmed against the original unit before installation. The pack is not suitable for laptops outside the named series or for systems requiring a different form factor.

Highlights

  • 63Wh capacity extends runtime on compatible Dell laptops
  • 2V lithium-ion chemistry matches original specifications
  • Replaces RJ40G, WY9DX and other Dell part numbers
  • Fits Latitude 5420, 5520 and Precision 3560 series
  • Brand-new condition with Grade A cells for reliable performance

Specifications

Battery TypeLithium Polymer

Questions about this item

Will the RJ40G fit inside my Dell Latitude 5420 without case modifications?

The RJ40G is built to the original dimensions for Latitude 5420, 5520 and Precision 3560 chassis; verify the connector position and cable length against your old battery before fitting.

What is the common installation mistake with the RJ40G connector?

The connector can seat loosely if the cable is not fully inserted; press until the latch clicks and confirm the battery is recognised in BIOS before closing the case.

How often will the 63Wh Li-ion pack need replacement under daily use?

Capacity gradually declines after hundreds of charge cycles; plan a replacement when run-time no longer meets your workload.

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