Lenovo ThinkPad T490
It depends on the configuration.
The reports show more than one memory layout for this laptop. Check the label or the system information before you buy.
- Slots listed
- At least 2 SO-DIMM slots
- Firmware lists
- 4 sockets, but no machine in the reports had more than 2 filled. Many laptops list sockets that aren't there, and some workstations hide two slots under the keyboard.
- Type
- DDR4-2666 260-pin SO-DIMM
- Most seen working
- 16 GB in two or more machines
- Firmware says
- 64 GB maximum (often wrong, so we show what machines run)
- How sure
- 5 of 9 reports show this layout
Worked out from 9 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 50 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 9 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the Lenovo ThinkPad T490?
It depends on the configuration: the reports show more than one memory layout for this laptop.
What type of RAM does the Lenovo ThinkPad T490 use?
DDR4-2666 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Lenovo ThinkPad T490 take?
Machines in the reports run up to 16 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.
What battery does the Lenovo ThinkPad T490 use?
Batteries in these laptops report 50 Wh, going by 9 reports. Other pack sizes may have shipped, so check the capacity printed on yours.