Lenovo ThinkPad 13 2nd Gen

Type 20J1 Laptop, from 2017 26 hardware reports
Memory
Up to 32 GB
2 laptop-size slots
Battery
42 Wh
Reported by the batteries
SSD and charger
Coming next
Checked from separate sources
Upgradable

Yes. 2 slots, up to 32 GB seen working.

It takes DDR4-2133 laptop-size sticks (SO-DIMM).

Slots
2 SO-DIMM slots
Type
DDR4-2133 260-pin SO-DIMM
Most seen working
32 GB in two or more machines
Firmware says
32 GB maximum
How sure
26 of 26 reports show this layout
See 16 GB DDR4-2133 SO-DIMM on AmazonOpens an Amazon search for this exact spec.

Worked out from 26 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

2 laptop-size slots
Illustration
Battery

Batteries in these laptops report 42 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 13 2nd Gen battery on AmazonMatch the capacity and part number to the label on your battery.

From 26 battery readings. Sources and method. Updated 9 Nov 2026.

Illustration

Questions

Can I upgrade the RAM in the Lenovo ThinkPad 13 2nd Gen?

Yes. 2 slots, up to 32 GB seen working. It takes DDR4-2133 laptop-size sticks (SO-DIMM).

What type of RAM does the Lenovo ThinkPad 13 2nd Gen use?

DDR4-2133 laptop-size sticks (SO-DIMM, 260-pin).

How much RAM can the Lenovo ThinkPad 13 2nd Gen 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 13 2nd Gen use?

Batteries in these laptops report 42 Wh, going by 26 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 13 2nd Gen, and the type code starts with 20J1. Other type codes share this name: 20J2.