Lenovo ThinkPad P15 Gen 1
Yes. 4 slots, up to 64 GB seen working.
It takes DDR4-2933 laptop-size sticks (SO-DIMM).
- Slots
- 4 SO-DIMM slots
- Type
- DDR4-2933 260-pin SO-DIMM
- Most seen working
- 64 GB in two or more machines
- Firmware says
- 64 GB maximum
- How sure
- 17 of 17 reports show this layout
Worked out from 17 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 94 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 17 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the Lenovo ThinkPad P15 Gen 1?
Yes. 4 slots, up to 64 GB seen working. It takes DDR4-2933 laptop-size sticks (SO-DIMM).
What type of RAM does the Lenovo ThinkPad P15 Gen 1 use?
DDR4-2933 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Lenovo ThinkPad P15 Gen 1 take?
Machines in the reports run up to 64 GB. That matches the 64 GB maximum the firmware reports.
What battery does the Lenovo ThinkPad P15 Gen 1 use?
Batteries in these laptops report 94 Wh, going by 17 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 P15 Gen 1, and the type code starts with 20ST. Other type codes share this name: 20SU.