Gateway LT21
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.
Yes. One slot, up to 1 GB seen working.
It takes DDR2-667 laptop-size sticks (SO-DIMM).
- Slots
- 1 SO-DIMM slot
- Type
- DDR2-667 200-pin SO-DIMM
- Most seen working
- 1 GB in the one machine reported
- Firmware says
- 4 GB maximum (often wrong, so we show what machines run)
- 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.
Check the drive you have.
The reports don't show this model's drive type yet. Look at the drive in it: a 2.5-inch box, about 7 by 10 cm, is SATA. A small stick is M.2, and its label says NVMe or SATA and its length (2230, 2242 or 2280).
- Drive type
- Check your current drive
How to tell a drive's type. Sources and method. Updated 10 Nov 2026.
Illustration Match the label on your battery.
Laptops this old mostly run replacement packs by now, so the capacity in the reports isn't the maker's. The capacity (Wh) and the part number are printed on the battery itself. A replacement should match that part number.
- Capacity
- On the battery's label
How to read a battery label. 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 Gateway LT21?
Yes. One slot, up to 1 GB seen working. It takes DDR2-667 laptop-size sticks (SO-DIMM).
What type of RAM does the Gateway LT21 use?
DDR2-667 laptop-size sticks (SO-DIMM, 200-pin).
How much RAM can the Gateway LT21 take?
Machines in the reports run up to 1 GB. The firmware reports a maximum of 4 GB, a figure that is often wrong.