Quick facts
RJ40G is a battery that fits 3 laptop models: Dell Latitude 5420, Latitude 5520, Precision 3560. It is also sold as M033W, 1K2CF, 75X16, 0RJ40G.
| Part number | RJ40G |
|---|---|
| Part type | Battery |
| Also sold as | M033W, 1K2CF, 75X16, 0RJ40G |
| Capacity | 63 Wh |
| Voltage | 15.2 V |
| Cells | 4 |
| Last checked | 2026-10-10 |
Compatible models (3)
- Dell Latitude 5420
- Latitude 5520
- Precision 3560
Laptops compatible with RJ40G
Fits 3 laptops: 3 OEM confirmed, 0 seller listed, 0 reported by users.
Also sold as: M033W, 1K2CF, 75X16, 0RJ40G
- Dell Latitude 5420 (Core i5-1145G7, 16GB, FHD)OEM confirmedMatched on: part number RJ40G, listed as Dell Latitude 5420
- Latitude 5520OEM confirmedMatched on: part number RJ40G
- Precision 3560OEM confirmedMatched on: part number RJ40G
Consumercarts is reader-supported. Learn more
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: Dell Last updated: 2026-10-10
Dell RJ40G Replacement Battery Review
Dell RJ40G replacement battery, the 63Wh 4-cell 15.2V pack for the Dell Latitude 5420, Latitude 5520 and Precision 3560.
Dell's Latitude 5420 spec sheet lists this 4-cell 63Wh pack as the larger of two battery options, at 238 mm long versus 207.9 mm for the 3-cell 42Wh pack (Dell WY9DX). Parts-People sells it as the Dell OEM RJ40G and lists M033W, 1K2CF and 75X16 as older codes for the same part.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Latitude 5420 and 5520 owners who want the longer-running battery
Not for
- Latitude 5420 units built for the 3-cell 42Wh battery, unless you confirm the larger pack fits
Specifications
What these specs mean| Brand | Dell |
|---|---|
| Battery Model Code | RJ40G |
| OEM Spare Part Number | RJ40G, 0RJ40G |
| Nominal Voltage | 15.2 V |
| Cell Count | 4 |
| Series Configuration | 4S |
| Capacity Wh | 63 Wh |
| Capacity Basis | OEM Label |
| Length | 238 mm |
| Width | 95.9 mm |
| Thickness | 5.7 mm |
| Compatible Models | Dell Latitude 5420, Latitude 5520, Precision 3560 |
| Replaces Part Numbers | M033W, 1K2CF, 75X16 |
FAQs
Which laptops does the Dell RJ40G battery fit?
The RJ40G is listed for the Dell Latitude 5420 (Core i5-1145G7, 16GB, FHD), Latitude 5520 and Precision 3560. Check the model code printed on your current battery before ordering.
What is the capacity of the RJ40G battery?
The RJ40G is rated at 63 Wh at 15.2 V, 4 cells. Source of the figure: oem label.
Which part numbers does the RJ40G replace?
It is listed as replacing M033W, 1K2CF, 75X16. A battery with any of these numbers on its label is the same part.
Is the RJ40G an original Dell battery?
Yes. The listing is for an original Dell (OEM) battery.