Lenovo IdeaPad S145-15IIL

Type 81W8 Laptop, from 2019 23 hardware reports
Memory
Up to 12 GB
1 laptop-size slot + soldered
SSD and charger
Coming next
Checked from separate sources
Partly soldered

Yes, you can add one stick. Up to 12 GB seen working.

4 GB is soldered to the board and one slot is free for a DDR4-2666 laptop-size stick.

Free slots
1 SO-DIMM slot
Type
DDR4-2666 260-pin SO-DIMM
Soldered
4 GB
Most seen working
12 GB in two or more machines
Firmware says
12 GB maximum
How sure
21 of 23 reports show this layout
See 8 GB DDR4-2666 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 23 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

1 laptop-size slot plus soldered memory
Illustration

Questions

Can I upgrade the RAM in the Lenovo IdeaPad S145-15IIL?

Yes, you can add one stick. Up to 12 GB seen working. 4 GB is soldered to the board and one slot is free for a DDR4-2666 laptop-size stick.

What type of RAM does the Lenovo IdeaPad S145-15IIL use?

DDR4-2666 laptop-size sticks (SO-DIMM, 260-pin).

How much RAM can the Lenovo IdeaPad S145-15IIL take?

Machines in the reports run up to 12 GB. That matches the 12 GB maximum the firmware reports.

Is this my laptop?

Check the label on the bottom. It should say IdeaPad S145-15IIL, and the type code starts with 81W8. Other type codes share this name: 82DJ.

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