The WY9DX is the replacement battery for certain Dell Latitude 5420, Latitude 5520 and Precision 3560 laptops. It’s a Li-ion battery with a rated voltage of 11.4V and a capacity of 42Wh.
This is the WY9DX 42Wh battery. Some of the laptops that are compatible with it may in fact take a different battery (e.g. the RJ40G 64Wh). Always check the part number, physical shape and connector of your original battery before ordering.
Key Features
- Battery Model: WY9DX
- Battery Type: Lithium-ion (Li-ion)
- Capacity: 42Wh
- Compatible Devices: Selected Dell Latitude and Precision laptops
- Replacement Use: For replacing a worn or damaged compatible battery
- Warranty: 1 year
- Packaging: Well-packed in a protective box
Compatible Dell Laptop Models
Dell Latitude 14 5420 Series
This battery is listed for the following configurations:
- Dell Latitude 14 5420 CHKFM
- Dell Latitude 14 5420 FDTCY
- Dell Latitude 14 5420 XPC5H
Dell Latitude 15 5520 Series
- Dell Latitude 15 5520 39V1H
- Dell Latitude 15 5520 FPKNM
Dell Precision 15 3560 Series
- Dell Precision 15 3560 3H45Y
- Dell Precision 15 3560 4MTF7
- Dell Precision 15 3560 758J7
- Dell Precision 15 3560 7RV10
- Dell Precision 15 3560 F3T9T
Additional Dell Platform Identifiers
- Dell P137G
- Dell P137G001
- Dell P104F
- Dell P104F001
- Dell P104F002
Important: These configurations are based on the supplied compatibility information. Check your original battery part number and physical design before purchasing. Do not assume every laptop in the same series uses the same battery.
Compatible Battery Part Numbers
The WY9DX battery is listed for the following part numbers:
- WY9DX
- 01K2CF
- 075X16
- 0WK3F1
- 0M3KCN
- 005R42
Compare the part number printed on your original battery with the list above. Also check the connector position and battery shape.
Product Specifications
| Specification | Details |
|---|---|
| Battery Model | WY9DX |
| Battery Type | Li-ion |
| Voltage | 11.4V |
| Capacity | 42Wh |
| Color | Black |
| Condition | Brand new |
| Warranty | 1 year |
| Packaging | Protective box |
| Package Contents | 1 × battery |
Important: WY9DX 42Wh vs. RJ40G 64Wh
Some Dell laptops may use different battery configurations. The two battery options listed in the supplied information are:
- WY9DX: 42Wh — this is the battery sold on this page.
- RJ40G: 64Wh — a different battery configuration.
Before ordering, open your laptop’s case only if you can do so safely and without affecting your warranty, then check the original battery label and physical shape. If you are unsure, consult a qualified technician or contact the seller with your laptop model and original battery part number.
Do not choose a replacement based on laptop model alone.
How to Confirm Compatibility
Before placing your order:
- Check the full model number on your Dell laptop.
- Find the part number printed on your original battery.
- Confirm that the original battery is WY9DX or has a listed compatible part number.
- Compare the battery shape and connector with the product images.
- Verify that you need the 42Wh version rather than the RJ40G 64Wh version.
Package Contents
- 1 × WY9DX 42Wh replacement battery
The laptop and other accessories are not included.
Warranty and Support
This product includes a 1-year warranty. Please confirm your original battery part number and configuration before ordering to help avoid compatibility issues.
