Lenovo ThinkPad X1 Carbon 6th Gen
Expert rating6.6 / 10
- Display:
- 14.0-inch FHD IPS, 300 nits
- CPU:
- Core i5-8250U
- Battery:
- 57Wh internal
Upgrade and repair this laptop
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Manufacturer: Lenovo Last updated: 2026-10-10
Lenovo ThinkPad X1 Carbon 6th Gen Review
Lenovo ThinkPad X1 Carbon 6th Gen (2018, machine types 20KH and 20KG) with a Core i5-8250U, 8GB soldered LPDDR3, 256GB NVMe SSD, a 14-inch 1920x1080 IPS panel rated at 300 nits and a 57Wh internal battery.
Memory is soldered, but the M.2 SSD, the 57Wh battery and the display panel are all replaceable. Lenovo offered FHD non-touch, FHD on-cell touch, WQHD and HDR WQHD panels; the FHD non-touch panel uses a 30-pin connector while the touch, WQHD and HDR panels use 40-pin connectors, so check the label on your old panel before ordering.
Screen replacement
Lenovo lists FRU 00NY435 (AUO B140HAN03.1) and 00NY436 (BOE NV140FHM-N61) for the FHD non-touch panel, 01ER483 (AUO B140HAK02.3) for FHD touch, 00NY664 (LG Display LP140QH2-SPB1) for WQHD, and 00NY679 (AUO B140QAN02.0) for the 500-nit HDR WQHD option.
Battery replacement
The internal battery is the 3-cell 57Wh 01AV430 FRU family (also sold as 01AV429, 01AV431 and 01AV494), shared with the X1 Carbon 5th Gen.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating6.6 / 10
The X1 Carbon Gen 6 is a light, repairable 14-inch business laptop at 1.13 kg, with a Core i5-8250U, a 1920x1080 IPS screen and Thunderbolt 3. The 57Wh battery is generous for its weight, which helps if you carry it daily.
Memory is soldered at 8GB with a 16GB maximum, so it cannot be upgraded later. It also has WiFi 5, integrated graphics and a 300 nit 60Hz panel, so expect basic office performance.
Best for
- Buyers who want a light, repairable 14-inch business laptop
Not for
- Anyone who needs to upgrade RAM later; memory is soldered
Specifications
What these specs meanIdentity and variant
| Brand | Lenovo |
|---|---|
| Series | ThinkPad X1 Carbon 6th Gen |
| Series ID | lenovo-thinkpad-x1-carbon-gen6 |
| SKU Name | ThinkPad X1 Carbon 6th Gen (i5-8250U, 8GB, 256GB, FHD) |
| Chassis Code | 20KH, 20KG |
| Region Sold | Global |
Class and platform
| Laptop Class | Business |
|---|---|
| Release Year | 2018 |
| Weight | 1.13 kg |
Processor
| CPU Brand | Intel |
|---|---|
| CPU Model | Core i5-8250U |
| CPU Cores | 4 |
| CPU Base Power | 15 W |
Sustained power
| Sustained Power Source | Not Measured |
|---|---|
| Power Adapter Wattage | 65 W |
Graphics
| GPU Brand | Intel |
|---|---|
| GPU Model | Intel UHD Graphics 620 (integrated) |
| VRAM | 0 GB |
| Graphics Switching | Integrated Only |
Memory
| RAM Capacity | 8 GB |
|---|---|
| RAM Speed | 2133 MT/s |
| Memory Form Factor | Soldered |
| Memory Soldered | Yes |
| Max RAM Supported | 16 GB |
Upgradability
| RAM Slots | 0 |
|---|---|
| Storage Slots | 1 |
| Storage Form Factor | M.2 2280 |
| Storage Interface | PCIe 3.0 x4 |
| SATA Bay Present | No |
Storage as shipped
| Storage Capacity | 256 GB |
|---|---|
| Storage Type | NVMe SSD |
Display
| Display Size | 14 inches |
|---|---|
| Resolution Width | 1920 px |
| Resolution Height | 1080 px |
| Refresh Rate | 60 Hz |
| Panel Type | IPS |
| Brightness | 300 nits |
| Brightness Condition | Vendor Unstated |
| Touchscreen | No |
Battery and ports
| Battery Capacity | 57 Wh |
|---|---|
| Thunderbolt Support | Thunderbolt 3 |
| WiFi Standard | WiFi 5 |
FAQs
Can you upgrade the RAM in the Lenovo ThinkPad X1 Carbon 6th Gen?
No. The memory (8 GB) is soldered to the motherboard and there are no memory slots, so it cannot be upgraded after purchase. Choose the capacity you need when you buy.
Can you upgrade the SSD in the Lenovo ThinkPad X1 Carbon 6th Gen?
Yes. It has 1 M.2 2280 slot (PCIe 3.0 x4). It ships with 256 GB NVMe SSD.
What display does the Lenovo ThinkPad X1 Carbon 6th Gen have?
The Lenovo ThinkPad X1 Carbon 6th Gen has a 14-inch, 1920x1080, IPS, 60 Hz non-touch display.
Does the Lenovo ThinkPad X1 Carbon 6th Gen have Thunderbolt?
Yes. It supports Thunderbolt 3.
How big is the battery in the Lenovo ThinkPad X1 Carbon 6th Gen?
The Lenovo ThinkPad X1 Carbon 6th Gen has a 57 Wh battery.