Lenovo ThinkPad T490s
Yes. 2 slots, up to 32 GB seen working.
It takes DDR4-2400 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR4-2400 260-pin SO-DIMM
- Most seen working
- 32 GB in two or more machines
- Firmware says
- 32 GB maximum
- How sure
- 33 of 33 reports show this layout
Worked out from 33 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 57 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.
From 33 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the Lenovo ThinkPad T490s?
Yes. 2 slots, up to 32 GB seen working. It takes DDR4-2400 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad T490s use?
DDR4-2400 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Lenovo ThinkPad T490s take?
Machines in the reports run up to 32 GB. That matches the 32 GB maximum the firmware reports.
What battery does the Lenovo ThinkPad T490s use?
Batteries in these laptops report 57 Wh, going by 33 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 T490s, and the type code starts with 20NX. Other type codes share this name: 20NY.