Dell Latitude 5420 vs 7420 (Used): Memory, Ports and the 2-in-1 Mix-Up
Both are 11th Gen Intel Core business laptops, so the processors are close. On Dell’s documents the practical difference for a used buyer is memory: the 5420 has two DDR4 slots (up to 64 GB) while Dell states you cannot upgrade the memory on the 7420 (up to 32 GB). The 7420 name also covers a 2-in-1 with its own regulatory model, so confirm which one a listing is.
Models at a glance
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Dell Latitude 5420
11th Gen Intel Core · Reg. model P137G
- 64 GBmax memory (two DDR4 slots)
- 63 Whlargest battery option
- RJ45listed in port table
Dell support end date: not confirmed. Latitude 5420 Rugged is a different product.
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Dell Latitude 7420 / 7420 2-in-1
11th Gen Intel Core · Reg. model P135G / P136G
- 32 GBmax memory (Dell: not upgradable)
- 63 Whlargest battery option
- 2Thunderbolt 4 ports
Dell support end date: not confirmed. The 2-in-1 has its own regulatory model.
Illustrations show the product type, not the specific model. Figures are the manufacturers’ published specifications for new units; “n/c” means we did not find an official figure.
Good fit if
- You are choosing between used Latitude 5000 and 7000 series laptops from the 11th Gen generation.
- You may want to upgrade memory later.
Not a fit if
- You need weight, screen or price comparisons — this table covers only what Dell’s setup-and-specifications documents list.
Side by side (Dell specifications)
| Latitude 5420 | Latitude 7420 | |||||||
|---|---|---|---|---|---|---|---|---|
| Processor options | 11th Gen Intel Core i3-1125G4, i5-1135G7, i5-1145G7, i7-1165G7, i7-1185G7 | 11th Gen Intel Core i5-1135G7, i5-1145G7 vPro, i7-1165G7, i7-1185G7 vPro | ||||||
| Memory | DDR4-3200, two slots, up to 64 GB | LPDDR4x, up to 32 GB; Dell: “You cannot upgrade the memory” | ||||||
| Battery options | 3-cell 42 Wh or 4-cell 63 Wh | 3-cell 42 Wh or 4-cell 63 Wh | ||||||
| Ports | 2 × USB 3.2 Gen 1 (one with PowerShare), 2 × Thunderbolt 4, HDMI 2.0, RJ45 | 1 × USB 3.2 Gen 1 with PowerShare, 2 × Thunderbolt 4, HDMI 2.0 | ||||||
| Regulatory model | P137G | P135G (7420); P136G (7420 2-in-1) | ||||||
| On Microsoft’s Windows 11 processor list? | Yes for the 11th Gen i3/i5/i7 options | Yes for the 11th Gen i5/i7 options | ||||||
| Search on eBay | See on eBay | See on eBay | ||||||
| As an eBay Partner, we may earn a commission from qualifying purchases. | ||||||||
Sources: Dell Latitude 5420 and Latitude 7420 / 7420 2-in-1 Setup and Specifications (PDF), Microsoft Learn supported-processor list. Options vary by configuration; a used unit may be any of them.
Which one to look at first
- Look at the 5420 if you may upgrade memory later or want an RJ45 jack on the body.
See Dell Latitude 5420 on eBay - Look at the 7420 if the specific configuration listed suits you as it is, because Dell states its memory cannot be upgraded; read the RAM in the listing as final.
See Dell Latitude 7420 on eBay - A 7420 may be a 2-in-1 (P136G) or a clamshell (P135G). Check the photos and the title before comparing prices.
- Dell’s documents we read do not give a support end date or a release date for either model, so we state none. Check the exact service tag with Dell.
What to confirm on a used one
- Processor and memory, as listed — not the model name alone. Two units with the same name can differ.
- BIOS password. A BIOS supervisor or power-on password can limit setup or startup; ask the seller to show the BIOS screen. We found no Dell document to cite for clearing a forgotten one.
- Company management. A previous employer may have enrolled the laptop in management. We did not find manufacturer documentation to cite, so ask the seller to confirm in writing that it is unmanaged.
- Battery health and the original charger — see Buying a used business laptop.
- Windows 10 support ended on October 14, 2025; these processors are on Microsoft’s Windows 11 list, but the listing should say which Windows is installed.
Related
For eBay’s condition labels, see Refurbished vs used laptops. For another business family, see ThinkPad T14 Gen 2 vs Gen 3.
Current listings
Open an eBay search for each model, split by the condition label you care about. Searches are limited to Buy It Now items (remove that filter on eBay to see auctions).
- Search used Dell Latitude 5420
- eBay Refurbished (Certified, Excellent, Very Good) on eBay Refurbished under eBay’s Refurbished program for approved sellers. Check eBay’s current terms and the listing for warranty and returns.
- Used on eBay Pre-owned; the seller describes the condition. Returns and warranty are whatever the listing states.
- Open Box (listed by eBay as “New other”) on eBay Unused or opened-box item. It is not an eBay Refurbished item.
- Search used Dell Latitude 7420
- eBay Refurbished (Certified, Excellent, Very Good) on eBay Refurbished under eBay’s Refurbished program for approved sellers. Check eBay’s current terms and the listing for warranty and returns.
- Used on eBay Pre-owned; the seller describes the condition. Returns and warranty are whatever the listing states.
- Open Box (listed by eBay as “New other”) on eBay Unused or opened-box item. It is not an eBay Refurbished item.
Search results can include items for parts, empty boxes and accessories. Seller descriptions are the seller’s own statements; we have not verified them.
Frequently asked questions
What is the practical difference between the Latitude 5420 and 7420?
On Dell’s documents, memory: the 5420 has two DDR4 slots (up to 64 GB) while Dell states the 7420’s memory cannot be upgraded (up to 32 GB).
Is the Latitude 7420 a 2-in-1?
The 7420 name covers both a 2-in-1 (P136G) and a clamshell (P135G). Check the photos and the title before comparing prices.
Can a used Latitude have a BIOS password?
Yes, a supervisor or power-on password can limit setup or startup. Ask the seller to show the BIOS screen. We found no Dell document to cite for clearing a forgotten one.
Does Dell state a support end date?
The Dell documents we read give no support end date or release date for either model, so we state none. Check the exact service tag with Dell.
Model pages
- Dell Latitude 5420: specifications, used checks, eBay search
- Dell Latitude 7420: specifications, used checks, eBay search
Related guides
- Buying a Used Business Laptop: Windows Support, Locks and Battery
- Refurbished vs Used Laptops on eBay: What the Labels Mean
- ThinkPad T14 Gen 2 vs Gen 3 (Intel, Used): What Lenovo’s Specifications Change
Sources and method
Based on manufacturer documentation, not on testing the items. Facts are labeled by type. Manufacturer figures are for new products as documented by the maker; they are not measurements of any used item, and we did not buy, use or inspect these products. Reviewed 2026-11-06. See How We Evaluate.
- Dell Latitude 5420 Setup and Specifications (Rev. A04, May 2023) — Official specification
- Dell Latitude 7420 / 7420 2-in-1 Setup and Specifications (Rev. A04, Dec 2022) — Official specification
- Microsoft — Windows 10 support has ended on October 14, 2025 — Official documentation
- Microsoft Learn — Windows 11 supported Intel processors — Official specification
- Which one to look at first; what to confirm — Our analysis
PreOwnedPick is not eBay and does not sell, inspect, repair or warrant items. Prices, availability and terms are set by sellers and eBay.