Review: Bigme B751C S colour e-ink tablet

Review unit provided by Bigme

Bigme releases so many e-readers so frequently that it can get confusing trying to differentiate the differences between each model.

The Bigme B751C S is a 7-inch colour e-ink tablet released in early 2026 and is an update of the Bigme B751C from two years ago.

Retail price is USD 269, but it's currently USD 249 on the online store.

Specifications

The notable differences are the better note taking experience, larger battery capacity, higher 30 FPS e-ink mode.

Things included

• Tablet
• USB-A to USB-C charging cable
• SIM ejector
• Pen
• Replacement pen tip
• Pen tip remover
• User guide

My review unit came with the flip case, but at the time of review the flip case is not mentioned on the product page.

It's a decent flip case but it's not as good as the one provided with the Bigme B7 Pro which can prop up the tablet, and has a hole for cable charging. The Bigme B751C S has the USB-C charging port by the left side instead the bottom.

The pen goes into the pen holder instead of attaching to the side of the tablet for charging. The pen uses USB-C port for charging.

Design

Here's a side by side comparison of the Bigme B7 Pro (left) and Bigme B751C S. The two almost looks the same from the front. Bigme B7 Pro has two buttons with rounded corners, and USB-C port is slightly higher, though still on the left side.

The Bigme B751C S is a compact portable e-ink tablet that's easy to bring around. Weight is just 220g and that's considered lightweight.

Design looks good, clean and simple.

The two side buttons can be customised to adjust volume, DPAD left DPAD right, page up and page down.

Additionally, there are eight softkeys which can be activated with finger, for

• Home screen
• Task switcher
• Settings
• Eink Center
• Apps
• Control Center
• Full refresh
• Back

The softkeys are very convenient. Tapping twice on the Control Center closes the Control Center, but tapping twice on the task switcher, settings, Eink Center twice does not close whatever was open.

Tablet is quite thin, just 7mm. On the left side is a speaker which sounds hollow, which isn't surprising. Location of the USB-C charging port on the lower left is inconvenient as the case has no hole for the cable to go through. And the case for the Bigme B7 Pro does not work with this tablet because of different USB-C port location.

Back is made with plastic and has texture that looks like leather. This tablet has no camera on the front and back. There's no face unlock, no fingerprint unlock.

Display

The display is a 7-inch Kaleido 3 display with 1264 × 1680 resolution. Pixel density for BW is 300 PPI and for colour is 150 PPI. Refresh rate is 30 FPS.

Text in comics and PDFs is going to look small on a 7-inch display. For reading comics, I prefer a tablet that's 10 inches or larger. It is still possible read comics, but those small Asian paperback comics will look better with slightly larger text.

A 7-inch tablet is more suited for reading text, and if you're just reading text, having a colour e-ink display is not necessary. A BW e-ink display will give you much better contrast with the text on display.

The main issue, already well documented, is Kaleido 3 displays look dark by default. The contrast with text on the dark e-ink canvas is not ideal. Shown above is the display without front light.

Shown above is the display with full front light. Having some amount of front light will improve contrast noticeably, and provide for a much better reading experience. This is a tablet that almost always needs front light unless the tablet is under direct sunlight.

Default text quality looks good, affected only by the e-ink contrast level.

Magazine mode has better text quality but at the expense of more noticeable page refresh latency. Default text quality is perfectly acceptable to me.

Shown below is how a colour wheel looks with various display or refresh modes.

Default. There seems to be some issues with displaying green. Violets, mauves, mauve pinks, pinks are difficult to differentiate from one another. Lighter red, orange, yellows, yellow greens are difficult to differentiate from one another.

Comics. Colours are more saturated, but colours are easier to differentiate from one another.

Magazine. Colours are more saturated, but certain colours can be difficult to differentiate from one another due to being similar colour and similar value.

Video. Colours almost look like default settings, but on close look there's grain in the colours.

The difference between the different display modes would be the refresh speed which will vary from fast to slow. There will be a compromise between visual quality and refresh speed. Which to choose is just personal preference. I would go with the default mode most of the time, but may switch to comic mode when I want better colours.

OS and software

The tablet runs on Android 14 and there's official support for Google Play Store.

Bigme has some pre-installed Bigme apps and whether they are useful or not depends on whether you have use for them.

There's no cellular so if you need that you can go with the Bigme B7 or B7 Pro.

Software features from Bigme generally speaking is quite basic, which is alright as I'm not expecting much for a device that's designed primarily for reading.

Performance

Overall performance of the tablet is smooth enough, responsive enough, limited only by the e-ink display technology. The Bigme B7 Pro does feel more responsive as apps will launch faster, but performance of Bigme B751C S is still acceptable as an e-ink tablet. I've no major complaints here.

4G RAM is still alright.

If you find 64GB storage limited, you can always add more storage with a micro SD card, or use cloud storage such as Google Drive, Microsoft OneDrive, Dropbox, etc.

Writing experience

The matte display is smooth and pen tip glides quite easily and makes writing fast.

The included pen supports palm rejection and pressure sensitivity. Pen performance is better than USI pens as there's less noticeable diagonal line wobble or jitter.

There's some latency which can be seen when the line is chasing the pen tip.

The display is almost laminated but there's still a little gap between the e-ink and surface. When writing, there is still a little gap between the line and the pen tip above. This gap together with the latency affects the overall writing experience.

Writing experience is probably a B or B- for me. Just for comparison purposes, Samsung is A+, Apple Pencil is A, and for A- to B+ there are Xiaomi, Huawei, Lenovo.

The default Bigme Notes app works fine for writing although features are lacking compared to other note taking apps available from the Google Play Store.

Third party note taking apps can work but the experience is usually not good. Those apps are not designed for e-ink displays so the UI and colours are usually quite difficult to see, and there's even more noticeable latency.

There's the Global Handwriting feature which works with Microsoft OneNote. Where you can write with improve latency (default Bigme pen latency), and the line will appear thin first before being update to the actual stroke and colour. Writing experience is not ideal too.

IMPORTANT
One important thing to note is the pen charges with a USB-C port. Battery capacity inside such pens is small, and if the pen is left in a discharged state for long periods of time, the battery can get damaged. I'm speaking from experience.

If you do not use the pen regularly, at least charge the pen once a month. And set an alarm or calendar alert to do that.

Pens that charge magnetically by the side of the tablet do not have such problem because the pen is always charged by the side of the tablet.

Battery life

Battery life is around 8 - 10 hours with front light, and will vary depending on whether there's Wifi and front light.

Conclusion

The Bigme B751C S seems like a decent tablet. Reading experience is good provided you enable front light, and front light has to be enabled most of the time as the Kaleido 3 display looks dark by default.

Writing experience has improved slightly but it's still not as good compared to other e-ink devices.

Battery life has improved to 8 - 10 hours and is a good upgrade over the previous model.

Overall performance looks and feels smooth enough for an e-ink tablet. Android OS has been updated to 14 from 11 which is great.

Pricing is reasonable and competitive with other brands so this is a tablet worth considering if you're looking for a colour e-ink tablet.

Pros and cons at a glance
+ Beautiful design
+ Solid build quality
+ Comes with pen
+ Case has auto wake and sleep
+ Case has pen holder
+ Has physical buttons
+ The 8 softkey shortcuts are very convenient
+ Lightweight, compact, portable for one-hand usage
+ Reasonable speed for e-ink tablet
+ Colours look alright, but have to adjust settings for best look
+ Has Google Play Store
+ Brightness sliders are easy to use
+ Battery life is good for just reading
- Pen does not charge magnetically
- Note taking performance is alright, could be better
- Colour e-ink canvas is darker than BW e-ink canvas
- Text has grain due to colour e-ink canvas. Minor issue though.
- 7-inch is not ideal for comics and PDFs
- No fingerprint unlock, no face unlock
- Speaker is loud enough but sounds hollow

Availability

The Bigme B751C S is available from the Bigme online store.