Dell Inspiron 7405 2n1
Yes. 2 slots, up to 16 GB seen working.
It takes DDR4-3200 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR4-3200 260-pin SO-DIMM
- Most seen working
- 16 GB in two or more machines; one machine runs 32 GB
- Firmware says
- 64 GB maximum (often wrong, so we show what machines run)
- How sure
- 12 of 12 reports show this layout
Worked out from 12 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 40 Wh or 53 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 12 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the Dell Inspiron 7405 2n1?
Yes. 2 slots, up to 16 GB seen working. It takes DDR4-3200 laptop-size sticks (SO-DIMM).
What type of RAM does the Dell Inspiron 7405 2n1 use?
DDR4-3200 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Dell Inspiron 7405 2n1 take?
Machines in the reports run up to 16 GB, and one runs 32 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.
What battery does the Dell Inspiron 7405 2n1 use?
Batteries in these laptops report 40 Wh or 53 Wh, going by 12 reports. Other pack sizes may have shipped, so check the capacity printed on yours.
Is this my laptop?
Check the model name on the label underneath. It should read Inspiron 7405 2n1.