GoKawiilXteink 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.
GoKawiil's interpretation of the reporting above, not reported fact.
Moving to Android opens the tiny e-reader to the full ecosystem of reading apps and subscription services, addressing one of the biggest limitations that made the X4 a niche product despite its popularity. A bigger battery and more storage also make it more practical for everyday use rather than just a novelty device for DRM-free files.
- Xteink S4 runs Android 11 instead of a proprietary Linux OS, unlike its predecessor the X4
- Battery capacity more than doubles from 650mAh to 1,400mAh
- Device launches first in China, with a possible international release later
Xteink X4 E-Ink E-Reader — If the Android-powered Xteink S4 has you intrigued, the original Xteink X4 is available now and offers that same pocketable, phone-mountable E-Ink reading experience the whole line is known for. It's a great way to try the compact DRM-free reading format before the flashier successor arrives. Perfect for stashing in a bag or clipping to your phone for reading on the go.
See Xteink X4 E-Ink E-Reader on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: androidauthority.com, 2026-09-17
Published there as: “This tiny, beloved e-reader is getting a successor that runs on Android”
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