Lenovo ThinkPad E15 Gen 4
Yes. At least 2 slots, up to 40 GB seen working.
It takes DDR4-3200 laptop-size sticks (SO-DIMM).
- Slots
- At least 2 SO-DIMM slots
- Firmware lists
- 8 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
- DDR4-3200 260-pin SO-DIMM
- Most seen working
- 40 GB in two or more machines
- Firmware says
- 256 GB maximum (often wrong, so we show what machines run)
- How sure
- 29 of 29 reports show this layout
Worked out from 29 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 45 Wh or 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 29 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the Lenovo ThinkPad E15 Gen 4?
Yes. At least 2 slots, up to 40 GB seen working. It takes DDR4-3200 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad E15 Gen 4 use?
DDR4-3200 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Lenovo ThinkPad E15 Gen 4 take?
Machines in the reports run up to 40 GB. The firmware reports a maximum of 256 GB, a figure that is often wrong.
What battery does the Lenovo ThinkPad E15 Gen 4 use?
Batteries in these laptops report 45 Wh or 57 Wh, going by 29 reports. Other pack sizes may have shipped, so check the capacity printed on yours.