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Xteink S4 e-reader switches to Android 11, doubles battery capacity

Chinese startup Xteink is following up its compact X4 e-reader with the Xteink S4, a 4.3-inch E-Ink device that ditches the previous proprietary Linux OS for Android 11. This change lets users sideload apps like Kindle, Kobo, and KOReader instead of being limited to DRM-free EPUB files. The S4 also bumps up specs with 2GB RAM, 32GB storage, and a 1,400mAh battery, more than double the X4's 650mAh cell.

androidauthority.com · 2026-09-17 · xteink s4, xteink x4, android 11

Boox reveals more details on tiny Picco e-reader, expects November launch

Boox showed additional details of its Picco e-reader at IFA, a compact rival to the Xteink X4 with a 3.97-inch touchscreen e-paper display and physical page-turn buttons that support customizable short and long presses. The device skips onboard storage in favor of microSD cards, but adds USB-C and WiFi transfer options absent from Xteink's hardware, and runs a stripped-down Linux OS rather than Android, bundling apps like a timer, todo list, and reading tracker.

theverge.com · 2026-09-06 · boox picco, xteink x4, e-reader