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OLPC XO-4

XO-4 · 2013 · laptop

Specifications

Cpu: Marvell Armada PXA2128, dual-core ARM Cortex-A9, 1.2 GHz
Ram: max: 2 GB DDR3 on higher-spec builds (soldered) · base: 1 GB DDR3 (soldered)
Ports: USB 2.0 x2 · SD card slot · HDMI out · Headphone/mic combo jack
Battery: Removable pack, 2 or 4 cell LiFePO4 (~22 Wh) or 5 cell NiMH (~16.5 Wh), rated 2,000+ charge cycles
Display: 7.5" 1200x900 dual-mode transflective (color transmissive indoors, monochrome reflective in sunlight); XO-4 Touch adds a Neonode multi-touch overlay and a reversible hinge for tablet mode
Storage: base: 4 GB NAND flash (soldered) · options: 8 GB NAND flash configuration · SD card expansion slot
Weight: 1.3 kg
Os Support: latest: Sugar on Fedora based OLPC OS; XO-4 Touch units could alternately run Android · shipped: Sugar on Fedora based OLPC OS
Release Price: ~$200 (NGO/government procurement only, not sold directly to consumers)

Variants

Models

XO-4 TouchAdds a Neonode multi-touch display overlay and a reversible display hinge, folding flat into a tablet form factor. Sunlight-readable touch layer works with a bare finger or stylus.

XO-4 (clamshell, non-touch)Standard fixed-hinge laptop configuration without the touch overlay, the more common deployment unit.

Upgrade paths

RAM

Soldered DDR3, fixed at 1 GB or 2 GB depending on the build ordered · No user upgrade path: RAM configuration is set at manufacture per deployment order, not user-selectable after purchase.

LOCKED

storage

SD card slot for expansion alongside the fixed 4 GB or 8 GB internal NAND · Internal flash is soldered but the SD slot lets a child or teacher add capacity without tools, same philosophy as earlier XO models.

~$10-20 for an SD card

EASY

battery

User-swappable pack across LiFePO4 or NiMH chemistries, no tools · Hand-release latch continues the field-serviceable design of the whole XO line; NGOs could source whichever chemistry was locally available.

EASY

other

Sealed, dust and moisture resistant rubber-membrane keyboard and fanless enclosure, serviceable with basic tools per OLPC's public repair documentation · The last mainstream XO revision: rugged classroom-first construction carried through to the end of the line, but the smaller two-port USB layout is a step down from earlier XO models.

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