Xteink S4 vs Xteink X4
Better figure, where one is clearly better
| XteinkS4 | XteinkX4 | |
|---|---|---|
| Overview | ||
| Released | September 2026 (early information) | December 2025 |
| Screen | ||
| Screen size | 4.3″ | 4.3″ |
| Resolution | – | 800 × 480 |
| Sharpness | 220 pixels per inch | 220 pixels per inch |
| Colour | No | No |
| Front light | Yes, adjustable warmth | No |
| Display detail | 4.3-inch E Ink multi-touch panel; 220 ppi (Good e-Reader; Xteink hasn't published the resolution or ppi) | E Ink, 220 ppi; not a touchscreen. Resolution from Xteink's recommended wallpaper size (480 × 800) in the user guide; later Xteink listings say 219 ppi |
| Front light | Front light with adjustable warm/cool colour temperature | – |
| Reading and writing | ||
| Stylus | No | No |
| Page-turn buttons | Yes | Yes |
| Audiobooks | Yes | No |
| Storage | 32 GB | 32 GB |
| Software | Android | Other |
| Formats | More than 10 formats natively (Xteink hasn't listed them), plus whatever installed reading apps open | TXT (UTF-8), EPUB; BMP and JPG images (up to 1024 × 1024 px, under 2 MB); fonts in .bin format only |
| Book store | None built in; Android 11 with mainstream reading apps allowed, such as Kindle, Kobo and KOReader (Xteink doesn't say whether Google Play is included) | None; books are copied to the microSD card over USB-C or sent over Wi-Fi |
| Design | ||
| Weight | 95 g | 74 g (better) |
| Materials | Magnetic back for phones | Magnetic back for phones with MagSafe-style magnets; adhesive metal rings included for other phones |
| Size | 6.98 mm thick, about 95 g; Xteink hasn't given the height and width | 114 × 69 × 5.9 mm (4.49 × 2.72 × 0.23 in in the user guide). Weight 74 g in the user guide; Xteink's later blog posts say 77 g |
| Colours | – | Space Black, White |
| In the box | – | X4, microSD card, screen protector, 2 adhesive metal rings |
| Connections and battery | ||
| Battery life detail | 1400 mAh | 650 mAh; up to 14 days on a charge at 1–3 hours of reading a day (Xteink's Amazon listing); full charge in 1–2 hours |
| Charging | USB-C (Good e-Reader, The eBook Reader) | USB-C |
| Connectivity | Wi-Fi, Bluetooth, USB-C; 2 GB RAM; 32 GB built-in storage, no microSD slot | Wi-Fi (2.4 GHz only), Bluetooth, USB-C, microSD slot (32 GB card included in the user guide; Xteink's later listings say 16 GB, expandable) |
| Audio | Bluetooth audio for listening (Good e-Reader); Xteink doesn't say whether there's a speaker | – |
