FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U939X
Only one machine has reported its memory so far, so this answer rests on a single example. Check the label or open the panel before you buy.
No. The memory is soldered to the board.
16 GB is built in and there is no slot to add more.
- Free slots
- None
- Type
- LPDDR3-2133
- Soldered
- 16 GB
- Firmware says
- 16 GB maximum
- How sure
- 1 of 1 report show this layout
Worked out from 1 hardware report of this laptop. Sources and method. Updated 10 Nov 2026.
Yes. It takes an NVMe M.2 SSD.
The slot runs at PCIe 3.0 x4, up to about 3.9 GB/s. A faster PCIe 4.0 drive works too, at that speed. M.2 drives come in 2230, 2242 and 2280 lengths (30, 42 and 80 mm). Check the length printed on your current drive before you order.
- Drive type
- NVMe (PCIe)
- Slot speed
- PCIe 3.0 x4, from 1 machine
- Length
- Check your current drive
- How sure
- NVMe drive in 1 of 1 machines
From 1 PCI device report. Sources and method. Updated 10 Nov 2026.
Illustration The battery in the one machine reported reports 50 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.
- Capacity
- 50 Wh
From 1 battery reading. Sources and method. Updated 10 Nov 2026.
Illustration Match the label on your charger.
We don't have this model's charger rating yet. The label on your charger shows it: the output line gives volts and amps, and volts times amps is the watts (19.5 V at 3.33 A is 65 W). Buy one with the same plug, the same voltage and at least as many watts.
- Rated output
- On your charger's label
How to read a charger label. Sources and method. Updated 10 Nov 2026.
Illustration Questions
Can I upgrade the RAM in the FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U939X?
No. The memory is soldered to the board. 16 GB is built in and there is no slot to add more.
What type of RAM does the FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U939X use?
LPDDR3-2133 memory soldered to the board.
What SSD does the FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U939X take?
Yes. It takes an NVMe M.2 SSD. The slot runs at PCIe 3.0 x4, up to about 3.9 GB/s. A faster PCIe 4.0 drive works too, at that speed. M.2 drives come in 2230, 2242 and 2280 lengths (30, 42 and 80 mm). Check the length printed on your current drive before you order.
What battery does the FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U939X use?
The battery in the one machine reported reports 50 Wh. Check the capacity printed on yours before you order.
Is this my laptop?
Check the model name on the label underneath. It should read LIFEBOOK U939X.