Teclast T40 Air tablet review – Very good runtimes despite not being too expensive
Teclast has lots of tablet models for sale, especially on online shops such as Amazon. The Chinese manufacturer has amassed quite a bit of interest in its products, as they are mostly relatively inexpensive and still offer enough power for everyday use. They also usually feature at least one distinctive feature, such as mobile data support, lots of storage or an extra-powerful battery.
The Teclast T40 Air is a mid-range tablet which can currently already be found for well under US$200. It is portable thanks to its 10.36-inch display, features a relatively slim case and it can even make use of the 4G network. Let's take a closer look at how the T40 Air performed in our test and in everyday use.
Possible competitors compared
Rating | Date | Model | Weight | Height | Size | Resolution | Price |
---|---|---|---|---|---|---|---|
80 % v7 (old) | 11 / 2023 | Teclast T40 Air T7255 (T616), Mali-G57 MP1 | 464 g | 7.7 mm | 10.36" | 2000x1200 | |
79.9 % v7 (old) | 10 / 2023 | Teclast M50 Pro T7255 (T616), Mali-G57 MP1 | 435 g | 7.9 mm | 10.10" | 1920x1200 | |
81.2 % v7 (old) | 05 / 2023 | Samsung Galaxy Tab A7 LTE 2022 T618, Mali-G52 MP2 | 477 g | 7 mm | 10.40" | 2000x1200 | |
80 % v7 (old) | 03 / 2023 | Lenovo Tab M10 Gen 3 T610, Mali-G52 MP2 | 460 g | 8.5 mm | 10.10" | 1920x1200 | |
80.8 % v7 (old) | 02 / 2023 | Blackview Tab 13 Helio G85, Mali-G52 MP2 | 450 g | 7.7 mm | 10.10" | 1920x1200 |
Case – Modern metal
The manufacturer has chosen a metal case which has a small plastic insert on the top edge to ensure better mobile network reception. The dark-gray case feels very high-quality and its stability is okay — however, we noted some image errors when we twisted the tablet while the screen was switched on. Plus, it makes some subtle creaking noises when you do so.
The bezels are relatively slim, while still allowing you to hold the tablet comfortably without accidentally activating the touchscreen. With a weight of 464 grams, the device isn't all too heavy and it can be held for longer periods of time without straining your arms too much.
It isn't protected against the elements, which means you should probably keep the tablet away from too much water and dust.
Connectivity – The Teclast tablet has a lot of storage
The tablet has 256 GB of storage — very impressive for this price range — giving you enough space for pictures, videos and lots of other things. Its 8 GB RAM is also very generous for this price class.
The device's USB-C port is only connected with USB-2.0 speeds internally, leading to data transfers being on the slower side, while transmitting the screen content through a cable to an external monitor is not possible.
It features a 3.5-mm audio jack, which means you can also use your analogue headphones without any issues. However, it doesn't support NFC, so you can't use contactless payment services, for example.
If you hold the tablet horizontally, then the SIM and microSD card slot are situated on the right side of the case. Here, you can install a nano SIM in order to use mobile data or to make telephone calls. For the latter, we would recommend using a headset if you don't want passers-by to overhear your conversations.
microSD card reader
In our test, the Teclast T40 Air's microSD card reader proved to be quite fast using our Angelbird V60 as a reference card. This makes it easy to expand the tablet's already large storage.
SD Card Reader - average JPG Copy Test (av. of 3 runs) | |
Teclast T40 Air (Angelbird V60) | |
Teclast M50 Pro (Angelbird V60) | |
Blackview Tab 13 (Angelbird V60) | |
Lenovo Tab M10 Gen 3 (Angelbird V60) | |
Samsung Galaxy Tab A7 LTE 2022 (Angelbird V60) |
Cross Platform Disk Test (CPDT)
Software – Insecure updates
The operating system installed by the manufacturer is quite close to stock Android 13. It doesn't have any bloatware (third-party sponsored apps) installed. At the time of testing, the latest security patch was from June 2023 — not terribly up to date.
Upon asking the manufacturer, it told us that updating to new Android versions should be possible. It is currently in the process of working on an overview of all its products' update supplies — this should still be released in 2023. In the past, Teclast tablets have been given new software versions rather sporadically, however, they did always seem to resolve any issues that users had reported.
It features a Widevine certification, meaning you can also view streaming content in HD.
Communication and GNSS – Mobile data included
WiFi 5 is the fastest WLAN standard mastered by the Teclast T40 Air, leading to quite consistent (and above-average for the price cass) transfer rates. Close to the router, web pages are loaded relatively quickly and it has access to the full reception. 10 metres away from the router and with 3 walls in between, we had access to 3/4 of the reception and it sometimes took a few moments for pages to load.
Within this price class, one thing isn't always standard (although it isn't entirely new either): The Teclast T40 Air features LTE support. It has access to a good selection of frequencies, meaning you at least shouldn't have any issues connecting to the internet on your travels that are limited to your own continent. The signal quality was decent in our test, but a little worse than on high-end phones.
Networking | |
iperf3 receive AXE11000 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Samsung Galaxy Tab A7 LTE 2022 | |
Teclast T40 Air | |
iperf3 transmit AXE11000 | |
Blackview Tab 13 | |
Teclast M50 Pro | |
Teclast T40 Air | |
Lenovo Tab M10 Gen 3 | |
Samsung Galaxy Tab A7 LTE 2022 |
The location module didn't work as well during our test when using the app — it did manage to find quite a few satellites and it worked with almost all bigger networks, however, even after 10 minutes, it didn't manage to locate us outside.
These aren't the best conditions for our practical test, a bike trip on which we compare the tablet with a Garmin Venu 2 smartwatch. Indeed, the location determined by the Teclast T40 Air always deviated slightly from the route we actually took.
All-in-all, we didn't notice any grave errors, meaning the tablet can definitely be used for locating if you don't require good accuracy. However, its failures during our app test and its less precise positioning in our practical test lead us to not comfortably be able to recommend it as a navigation device.
Cameras – Bad even for a tablet
You shouldn't expect too much from the Teclast T40 Air's cameras. Many tablets see this as an area on which to save money — at the end of the day, a device as large as this will not be prioritized as a device for taking pictures and instead, it will likely only be used to document certain situations, scan documents or scan QR codes.
For this, its 13-megapixel back camera with an LED flash is sufficient. On the other hand, if you are expecting great photos, then you will be disappointed by the tablet's blurry photos which lack dynamics in light as well as dark areas. Its photos also have quite a hefty blue tint and larger areas are often very grainy. In the photo of our surroundings, you can't see much detail and some areas are even very unsharp. In low-lighting conditions with high levels of contrast, dark areas remain exactly that: dark.
Videos can be recorded at a maximum of 1080p and at 30 fps.
On the front, the tablet features an 8-MP sensor which takes quite dark photos, even in good lighting conditions. When zoomed in, you can only identify limited details and the photo appears quite grainy.
The camera system is good enough for taking snapshots, however, it can't even keep up with mid-range camera phones.
Image Comparison
Choose a scene and navigate within the first image. One click changes the position on touchscreens. One click on the zoomed-in image opens the original in a new window. The first image shows the scaled photograph of the test device.
Main camera plantMain camera surroundingsMain camera low lightThe Teclast T40 Air's main camera even struggled to deliver clean images in our test lab: Its contrast is low, areas appear unclean and all-in-all, photos don't look the best. At only 1 lux illumination, the sensor isn't able to depict any visible content.


Accessories and warranty – 12-month manufacturer warranty
Teclast offers a 12-month warranty on all of its devices.
Upon asking, the manufacturer recommends contacting the distributor for any repair processing in the event of a warranty claim.
The T40 Air is supplied with a charger, a USB cable and a SIM tool. Teclast also offers a transparent case with a stand function, which can be found online for about US$15.
Input devices & operation – Mostly smooth
You can't expect refresh rates above 60 Hz on this tablet, which means it barely feels smooth to operate. Even so, the Teclast T40 reacts reliably and sensitively — we only noted it lagging a little when running more intensive apps.
The hardware buttons along the top edge can be found well and have a clear pressure point. It doesn't feature a fingerprint sensor — only 2D facial recognition, which isn't quite as safe against manipulation but still, it unlocks the Teclast tablet reliably.
Display – Seeing blue?
The Teclast T40 Air has a display size of 10.36 inches, a resolution of 2,000 x 1,2000 pixels and bases on IPS technology. Its maximum brightness is about average for this class — we measured an average of 296 cd/m², which is mostly suited for indoor use without any strong light.
You do notice quite the blue tint when glancing at the display. This was confirmed using our spectrophotometer during the CalMAN test. It can be mitigated slightly using the T40 Air's onboard tools — especially using Night-Light mode. However, its color depiction is never amazing.
|
Brightness Distribution: 85 %
Center on Battery: 319 cd/m²
Contrast: 725:1 (Black: 0.44 cd/m²)
ΔE Color 10.9 | 0.5-29.43 Ø4.89
ΔE Greyscale 11.5 | 0.5-98 Ø5.1
87.9% sRGB (Calman 2D)
Gamma: 2.035
Teclast T40 Air IPS, 2000x1200, 10.4" | Teclast M50 Pro IPS, 1920x1200, 10.1" | Samsung Galaxy Tab A7 LTE 2022 IPS, 2000x1200, 10.4" | Lenovo Tab M10 Gen 3 IPS, 1920x1200, 10.1" | Blackview Tab 13 IPS, 1920x1200, 10.1" | |
---|---|---|---|---|---|
Screen | 26% | 16% | 29% | 35% | |
Brightness middle | 319 | 248 -22% | 322 1% | 343 8% | 344 8% |
Brightness | 296 | 234 -21% | 303 2% | 332 12% | 330 11% |
Brightness Distribution | 85 | 86 1% | 89 5% | 94 11% | 93 9% |
Black Level * | 0.44 | 0.2 55% | 0.45 -2% | 0.31 30% | 0.27 39% |
Contrast | 725 | 1240 71% | 716 -1% | 1106 53% | 1274 76% |
Colorchecker dE 2000 * | 10.9 | 5.3 51% | 7.02 36% | 5.9 46% | 5.32 51% |
Colorchecker dE 2000 max. * | 19.02 | 11.95 37% | 10.38 45% | 11.2 41% | 11.27 41% |
Greyscale dE 2000 * | 11.5 | 7.1 38% | 7.1 38% | 7.9 31% | 6.2 46% |
Gamma | 2.035 108% | 2.327 95% | 2.179 101% | 2.184 101% | 2.106 104% |
CCT | 11482 57% | 8112 80% | 8730 74% | 9198 71% | 8023 81% |
* ... smaller is better
Screen Flickering / PWM (Pulse-Width Modulation)
Screen flickering / PWM not detected | |||
In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8619 (minimum: 5 - maximum: 343500) Hz was measured. |
Display Response Times
↔ Response Time Black to White | ||
---|---|---|
33.1 ms ... rise ↗ and fall ↘ combined | ↗ 14.5 ms rise | |
↘ 18.6 ms fall | ||
The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.1 (minimum) to 240 (maximum) ms. » 89 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (20.9 ms). | ||
↔ Response Time 50% Grey to 80% Grey | ||
58.4 ms ... rise ↗ and fall ↘ combined | ↗ 32.4 ms rise | |
↘ 26 ms fall | ||
The screen shows slow response rates in our tests and will be unsatisfactory for gamers. In comparison, all tested devices range from 0.165 (minimum) to 636 (maximum) ms. » 94 % of all devices are better. This means that the measured response time is worse than the average of all tested devices (32.7 ms). |
Performance – Normal power for this price class
The Unisoc T616 is an SoC which is often installed into mid-range tablets and phones, meaning it is well-suited for the Teclast T40 Air. The processor has a maximum clock rate of up to 2 GHz and it performed similarly fast to comparable devices during the benchmarks.
In everyday use, you only have to deal with dropped frames when running more demanding apps — surfing the web, taking a look at photos or watching movies rarely leads to any dropped frames.
PCMark for Android - Work 3.0 | |
Average of class Tablet (3195 - 20841, n=72, last 2 years) | |
Teclast M50 Pro | |
Average Unisoc T7255 (T616) (7936 - 8066, n=7) | |
Teclast T40 Air | |
Samsung Galaxy Tab A7 LTE 2022 |
UL Procyon AI Inference for Android - Overall Score NNAPI | |
Average of class Tablet (2597 - 74821, n=55, last 2 years) | |
Samsung Galaxy Tab A7 LTE 2022 | |
Average Unisoc T7255 (T616) (2817 - 4209, n=5) | |
Teclast M50 Pro | |
Teclast T40 Air | |
Lenovo Tab M10 Gen 3 |
The ARM Mali-G57 MP1 GPU only features one computing core, which doesn't give this graphics solution a lot to work with when playing demanding games in particular. Even 3D benchmarks cannot be run smoothly at 30 fps at a resolution of 1080p — at 1440p or 4K, you can only expect a few frames per second.
GFXBench (DX / GLBenchmark) 2.7: T-Rex Onscreen | 1920x1080 T-Rex Offscreen
GFXBench 3.0: on screen Manhattan Onscreen OGL | 1920x1080 1080p Manhattan Offscreen
GFXBench 3.1: on screen Manhattan ES 3.1 Onscreen | 1920x1080 Manhattan ES 3.1 Offscreen
GFXBench: on screen Car Chase Onscreen | 1920x1080 Car Chase Offscreen | on screen Aztec Ruins High Tier Onscreen | 2560x1440 Aztec Ruins High Tier Offscreen | on screen Aztec Ruins Normal Tier Onscreen | 1920x1080 Aztec Ruins Normal Tier Offscreen | 3840x2160 4K Aztec Ruins High Tier Offscreen
3DMark / Wild Life Extreme Unlimited | |
Blackview Tab 13 | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
3DMark / Wild Life Extreme | |
Blackview Tab 13 | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast T40 Air | |
Teclast M50 Pro |
3DMark / Wild Life Unlimited Score | |
Blackview Tab 13 | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
3DMark / Wild Life Score | |
Blackview Tab 13 | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
3DMark / Sling Shot Extreme (ES 3.1) Unlimited | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
3DMark / Sling Shot Extreme (ES 3.1) Unlimited Graphics | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
3DMark / Sling Shot Extreme (ES 3.1) Unlimited Physics | |
Samsung Galaxy Tab A7 LTE 2022 | |
Teclast M50 Pro | |
Lenovo Tab M10 Gen 3 | |
Teclast T40 Air | |
Blackview Tab 13 |
GFXBench (DX / GLBenchmark) 2.7 / T-Rex Onscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench (DX / GLBenchmark) 2.7 / T-Rex Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench 3.0 / Manhattan Onscreen OGL | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench 3.0 / 1080p Manhattan Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench 3.1 / Manhattan ES 3.1 Onscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench 3.1 / Manhattan ES 3.1 Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Car Chase Onscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Car Chase Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Aztec Ruins High Tier Onscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Aztec Ruins High Tier Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Aztec Ruins Normal Tier Onscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / Aztec Ruins Normal Tier Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
GFXBench / 4K Aztec Ruins High Tier Offscreen | |
Samsung Galaxy Tab A7 LTE 2022 | |
Blackview Tab 13 | |
Lenovo Tab M10 Gen 3 | |
Teclast M50 Pro | |
Teclast T40 Air |
When browsing the internet, the Teclast T40 Air seems to be quite agile, although you may have to factor in some loading times when calling up pages. The laptop achieved good benchmark results for this class, but this may well have to do with its more up-to-date browser version.
Jetstream 2 - Total Score | |
Average of class Tablet (19.9 - 334, n=67, last 2 years) | |
Teclast M50 Pro (Chrome 117.0.5938.60) | |
Teclast T40 Air (Chrome 119) | |
Average Unisoc T7255 (T616) (45.4 - 57.2, n=5) | |
Samsung Galaxy Tab A7 LTE 2022 (Chrome 112) | |
Lenovo Tab M10 Gen 3 (Chrome 111) |
WebXPRT 4 - Overall | |
Average of class Tablet (21 - 315, n=66, last 2 years) | |
Samsung Galaxy Tab A7 LTE 2022 (Chrome 112) | |
Teclast T40 Air (Chrome 119) | |
Teclast M50 Pro (Chrome 117.0.5938.60) | |
Average Unisoc T7255 (T616) (45 - 60, n=4) | |
Lenovo Tab M10 Gen 3 (Chrome 111) |
WebXPRT 3 - Overall | |
Average of class Tablet (36 - 435, n=38, last 2 years) | |
Samsung Galaxy Tab A7 LTE 2022 (Chrome 112) | |
Teclast M50 Pro (Chrome 117.0.5938.60) | |
Teclast T40 Air (Chrome 119) | |
Average Unisoc T7255 (T616) (68 - 86, n=3) |
Speedometer 2.0 - Result | |
Average of class Tablet (2.59 - 572, n=59, last 2 years) | |
Teclast M50 Pro (Chrome 117.0.5938.60) | |
Teclast T40 Air (Chrome 119) | |
Average Unisoc T7255 (T616) (34.4 - 46.6, n=5) | |
Samsung Galaxy Tab A7 LTE 2022 (Chome 112) | |
Lenovo Tab M10 Gen 3 (Chome 111) |
Octane V2 - Total Score | |
Average of class Tablet (763 - 105178, n=86, last 2 years) | |
Teclast M50 Pro (Chrome 117.0.5938.60) | |
Teclast T40 Air (Chrome 119) | |
Average Unisoc T7255 (T616) (12141 - 15522, n=6) | |
Samsung Galaxy Tab A7 LTE 2022 (Chrome 112) | |
Lenovo Tab M10 Gen 3 (Chrome 111) | |
Blackview Tab 13 (Chrome 109) |
Mozilla Kraken 1.1 - Total | |
Average of class Tablet (319 - 34733, n=73, last 2 years) | |
Lenovo Tab M10 Gen 3 (Chrome 111) | |
Samsung Galaxy Tab A7 LTE 2022 (Chrome 112) | |
Average Unisoc T7255 (T616) (2531 - 3014, n=4) | |
Teclast T40 Air (Chrome 119) | |
Teclast M50 Pro (Chrome 117.0.5938.60) |
* ... smaller is better
The Teclast T40 Air might have a lot of storage, but its eMMC flash certainly isn't the fastest. However, you will hardly find anyone who does it better in this price class.
Subsequently, data transfers and loading times might take a little while.
Teclast T40 Air | Teclast M50 Pro | Samsung Galaxy Tab A7 LTE 2022 | Lenovo Tab M10 Gen 3 | Blackview Tab 13 | Average 256 GB eMMC 5.1 Flash | Average of class Tablet | |
---|---|---|---|---|---|---|---|
AndroBench 3-5 | 2% | -25% | 10% | -7% | -3% | 221% | |
Sequential Read 256KB | 270.7 | 257.8 -5% | 249 -8% | 277.2 2% | 289.1 7% | 272 ? 0% | 1144 ? 323% |
Sequential Write 256KB | 246.2 | 225.22 -9% | 83 -66% | 210.4 -15% | 173.1 -30% | 221 ? -10% | 783 ? 218% |
Random Read 4KB | 76.3 | 91.95 21% | 67.3 -12% | 105.1 38% | 79 4% | 81.3 ? 7% | 194.6 ? 155% |
Random Write 4KB | 67.8 | 68.13 0% | 58.8 -13% | 78.5 16% | 63.1 -7% | 61 ? -10% | 195.2 ? 188% |
Games – Wobbly 30 fps in 3D games
Playing simple games is no problem on the Teclast T40 Pro and most games can be downloaded from the Google Play Store — you aren't faced with any limitations as the owner of this tablet.
However, you can only expect 30 fps on most games and even so, it isn't the smoothest, to say the least. If you don't have very high expectations or if you only play 2D games anyway, then the T40 Air will be good enough. For fun 3D gaming, you will need better graphics power.
We would like to publish detailed fps rates, however, the tablet refuses to work correctly with the software from GameBench.
Emissions – The T40 Air barely gets warm
Temperature
The tablet's temperatures rise to a maximum of 33.9 °C on the front after prolonged use, which is only slightly noticeable. This means that you should have no problems holding the tablet in your hand even on hot days and when running demanding apps.
The 3DMark stress tests also give the all-clear: the processor is not throttled when the tablet is subjected to demanding tasks for a longer period of time. At most, there are slight fluctuations in performance, but they always return to the starting level.
(+) The maximum temperature on the upper side is 33.9 °C / 93 F, compared to the average of 33.7 °C / 93 F, ranging from 20.7 to 53.2 °C for the class Tablet.
(+) The bottom heats up to a maximum of 32.6 °C / 91 F, compared to the average of 33.2 °C / 92 F
(+) In idle usage, the average temperature for the upper side is 23.6 °C / 74 F, compared to the device average of 29.9 °C / 86 F.
3DMark Wild Life Stress Test
3DMark | |
Wild Life Extreme Stress Test | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast T40 Air | |
Teclast M50 Pro | |
Wild Life Stress Test Stability | |
Teclast M50 Pro | |
Samsung Galaxy Tab A7 LTE 2022 | |
Lenovo Tab M10 Gen 3 | |
Teclast T40 Air |
Speakers
The speakers on the sides of the Teclast tablet produce a decent sound that is not too treble-heavy, even at the highest volume. Of course, the tablet can't compete with a real hi-fi system, but listening to some music or playing movie soundtracks works quite well.
External speakers or headphones can also be connected via the 3.5-mm audio jack or Bluetooth. This works without any problems and the most necessary audio codecs for wireless playback are available, including AAC, SBC, aptX, aptX HD and LDAC.
Teclast T40 Air audio analysis
(+) | speakers can play relatively loud (85.2 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 29.8% lower than median
(±) | linearity of bass is average (10.5% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 5.1% higher than median
(+) | mids are linear (6.2% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.6% away from median
(+) | highs are linear (4.3% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (21.1% difference to median)
Compared to same class
» 59% of all tested devices in this class were better, 5% similar, 36% worse
» The best had a delta of 7%, average was 22%, worst was 129%
Compared to all devices tested
» 55% of all tested devices were better, 7% similar, 38% worse
» The best had a delta of 4%, average was 24%, worst was 134%
Blackview Tab 13 audio analysis
(+) | speakers can play relatively loud (82.8 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 27.2% lower than median
(±) | linearity of bass is average (12% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 7.8% higher than median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 6.3% higher than median
(+) | highs are linear (5.8% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (28.2% difference to median)
Compared to same class
» 85% of all tested devices in this class were better, 3% similar, 12% worse
» The best had a delta of 7%, average was 22%, worst was 129%
Compared to all devices tested
» 84% of all tested devices were better, 3% similar, 13% worse
» The best had a delta of 4%, average was 24%, worst was 134%
Power management – Big battery leads to long runtimes
Power consumption
Overall, the Teclast T40 Air requires relatively little power for its tasks, especially when compared to the rest of the class. Its maximum consumption at full load is 8.4 watts.
The tablet can be charged at a maximum of 18 watts. Due to its very powerful battery, it takes just over 2 hours to fully recharge the empty battery.
Off / Standby | ![]() ![]() |
Idle | ![]() ![]() ![]() |
Load |
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Key:
min: ![]() ![]() ![]() |
Teclast T40 Air 7200 mAh | Teclast M50 Pro 6000 mAh | Samsung Galaxy Tab A7 LTE 2022 7040 mAh | Lenovo Tab M10 Gen 3 5100 mAh | |
---|---|---|---|---|
Power Consumption | -4% | -10% | -46% | |
Idle Minimum * | 1.2 | 1.1 8% | 1.4 -17% | 1.9 -58% |
Idle Average * | 1.3 | 1.4 -8% | 1.6 -23% | 2.1 -62% |
Idle Maximum * | 1.5 | 1.9 -27% | 2 -33% | 2.5 -67% |
Load Average * | 5.6 | 5.5 2% | 4.2 25% | 7.6 -36% |
Load Maximum * | 8.4 | 8 5% | 8.7 -4% | 9 -7% |
* ... smaller is better
Power consumption: Geekbench (150 cd/m²)
Power consumption: GFXBench (150 cd/m²)
Runtimes
Its battery has a capacity of 7,200 mAh and subsequently, clearly beats most comparable devices. It is therefore no wonder that the Teclast T40 Air's runtimes are also very long: In our WLAN test, it achieved 15:18 hours, which should easily get you through the day with normal use.
If you like to play a lot of games, the battery will run out after 4:22 hours at the earliest. This means that even longer gaming sessions are no problem.
Teclast T40 Air 7200 mAh | Teclast M50 Pro 6000 mAh | Samsung Galaxy Tab A7 LTE 2022 7040 mAh | Lenovo Tab M10 Gen 3 5100 mAh | Blackview Tab 13 7280 mAh | |
---|---|---|---|---|---|
Battery Runtime | -34% | -4% | -14% | 1% | |
Reader / Idle | 2805 | 1660 -41% | 2869 2% | 1952 -30% | |
H.264 | 1020 | 579 -43% | 942 -8% | 1002 -2% | |
WiFi v1.3 | 918 | 555 -40% | 874 -5% | 861 -6% | 926 1% |
Load | 262 | 233 -11% | 250 -5% | 213 -19% |
Pros
Cons
Verdict – Generous connectivity, but not without its weaknesses
Of course, you can identify quite a few points of criticism on the Teclast T40 Air: Its screen's strong blue tint, the tablet's inaccurate location services and its very weak cameras, to name just a few.
At the same time, the device boasts many positive features: It has a lot of storage and RAM, can be used with mobile data, features a microSD slot, and — for fans of analogue headphones — it even has a 3.5-mm audio jack.
In addition, its massive battery results in very good runtimes, without the T40 Air feeling too heavy or bulky.
As the tablet can often be found on sale, and its dim screen and poor locating qualities shouldn't be too big a deal if you intend on using the tablet inside, the Teclast T40 Air might still actually be worth considering.
The Teclast T40 Air impresses with its stamina, mobile data support and generous storage. However, if you are looking for a bright display for outdoor use, then you just might want to look elsewhere.
We have a few alternative options for you to take a look at: The Teclast M50 Pr is more portable and a bit lighter — but it doesn't have as good a battery life. Samsung's Galaxy Tab A7 LTE 2022 delivers better performance, but only a limited amount of storage.
Price and availability
The Teclast T40 Air can currently be found on Amazon for a promotional price of US$151.99.
Teclast T40 Air
- 11/22/2023 v7 (old)
Florian Schmitt
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The selection of devices to be reviewed is made by our editorial team. The test sample was provided to the author as a loan by the manufacturer or retailer for the purpose of this review. The lender had no influence on this review, nor did the manufacturer receive a copy of this review before publication. There was no obligation to publish this review. We never accept compensation or payment in return for our reviews. As an independent media company, Notebookcheck is not subjected to the authority of manufacturers, retailers or publishers.
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