Lenovo ThinkPad X1 Carbon Gen 8

Type 20U9 Laptop, from 2020 40 hardware reports
Memory
Soldered
No slot to add more
Battery
51 Wh
Reported by the batteries
SSD and charger
Coming next
Checked from separate sources
Not upgradable

No. The memory is soldered to the board.

8 or 16 GB is built in and there is no slot to add more.

Free slots
None
Type
LPDDR3-2133
Soldered
8 GB or 16 GB, depending on the configuration
Firmware says
16 GB maximum
How sure
24 of 40 reports show this layout

Worked out from 40 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

All soldered
Illustration
Battery

Batteries in these laptops report 51 Wh.

That is the design capacity the batteries themselves report, and the label can read 1 to 3 Wh higher. Other pack sizes may have shipped, so check the capacity printed on yours before you order.

Lenovo ThinkPad X1 Carbon Gen 8 battery on AmazonMatch the capacity and part number to the label on your battery.

From 40 battery readings. Sources and method. Updated 9 Nov 2026.

Illustration

Questions

Can I upgrade the RAM in the Lenovo ThinkPad X1 Carbon Gen 8?

No. The memory is soldered to the board. 8 or 16 GB is built in and there is no slot to add more.

What type of RAM does the Lenovo ThinkPad X1 Carbon Gen 8 use?

LPDDR3-2133 memory soldered to the board.

How much RAM can the Lenovo ThinkPad X1 Carbon Gen 8 take?

Machines in the reports run up to 16 GB. That matches the 16 GB maximum the firmware reports.

What battery does the Lenovo ThinkPad X1 Carbon Gen 8 use?

Batteries in these laptops report 51 Wh, going by 40 reports. Other pack sizes may have shipped, so check the capacity printed on yours.

Is this my laptop?

Check the label on the bottom. It should say ThinkPad X1 Carbon Gen 8, and the type code starts with 20U9. Other type codes share this name: 20UA.