In our test, which consists of looping an HD video at 50
percent screen brightness, the Tab S2 lasted around seven and a half hours — a steep drop from 12.5 hours on the previous model.
Our battery test streams a full - screen video over Wi - Fi on 80
percent screen brightness, and the iPad mini 4 lasted for 5 hours and 15 minutes.
Indeed, for HD video playback at 50
percent screen brightness the Pad 300 lasted nine and a half hours, while with dock attached it managed 14 hours in the same scenario.
Not exact matches
The auto -
brightness feature lowers the
brightness, but not enough; I had to dial the
brightness down manually to as low as 4 to 10
percent to get to passable contrast with the E Ink
screen above.
Bright images with high APL have their
screen Brightness reduced by up to 30
percent, which introduces undesirable
Brightness variations with content.
To be fair, though, we had the phone's
screen set to 100 -
percent brightness.
However, considering that the Nexus 7's
screen is rated for a super-bright 400 nits, you may be comfortable running it at 25
percent brightness which, in our tests, caused the tablet to last 7 hours and 58 minutes, more than 30 minute improvement.
Compared to the 4th generation, the
screen reflectance decreased by 23
percent, the peak
brightness increased by 7
percent, and the contrast rating for high ambient light increased by 32
percent — all good.
The ASUS MeMO Pad lasted 6 hours and 32 minutes on the Laptopmag.com Battery Test (Web browsing over Wi - Fi with a
screen brightness of 40
percent).
In our battery test, a continuous looping video with Wi - Fi on and
screen brightness at 100
percent, the Springboard lasted 5 hours, 16 minutes.
As discussed below, the record low
screen Reflectance of 4.7 percent for the Galaxy Tab S further improves its effective Screen Brightness in high Ambient
screen Reflectance of 4.7
percent for the Galaxy Tab S further improves its effective
Screen Brightness in high Ambient
Screen Brightness in high Ambient Light.
The current record holder for Tablets is the Nokia Lumia 2520 with 684 cd / m2 (nits), while the Tab S has 546 nits with Automatic
Brightness On and 415 nits under manual
Brightness (10
percent lower for mixed content with 50
percent Average Picture Level APL and 25
percent lower for an all white 100
percent APL
screen).
Where the Galaxy Tab S does very well but does not break performance records is in maximum display
Brightness — the current record holder for Tablets is the Nokia Lumia 2520 with 684 nits, while the Tab S has 546 nits with Automatic
Brightness On and 415 nits under manual
Brightness (10
percent lower for mixed content with 50
percent Average Picture Level APL and 25
percent lower for an all white
screen).
The Zenfone Max Pro (M1) features a 5.99 - inch Full HD + display with a
screen resolution of 2160 x 1080 pixels, 450 nits
brightness, 1500:1 contrast ratio and 85
percent NTSC colour gamut.
On the plus side, the iPhone 5 has a much higher Peak
Brightness (556 versus 421 to 491 cd / m2), a much lower
Screen Reflectance (4.5 versus 5.6 to 6.5 percent), a much higher Contrast Rating for High Ambient Light (121 versus 65 to 88), and therefore much better screen visibility in high ambient
Screen Reflectance (4.5 versus 5.6 to 6.5
percent), a much higher Contrast Rating for High Ambient Light (121 versus 65 to 88), and therefore much better
screen visibility in high ambient
screen visibility in high ambient light.
We measured over nine hours of SD video playback (sans dock), and in a test simulating average use (
screen brightness at 50
percent, Bluetooth and Wi - Fi on, some standby periods) the tablet alone managed a whopping 14 hours!
The fourth generation iPad blew every other big -
screen tablet away in the LAPTOP Battery Test, which involves continuous Web surfing over Wi - Fi at 40
percent brightness.
However, when the Note's battery drops to 5
percent, the
screen automatically dims to about 10
percent brightness.
In single -
screen mode, the Echo lasted an epic 8 hours and 26 minutes on the LAPTOP Battery Test, which involves continuous surfing over 3G at 40 -
percent brightness.
The Galaxy Player 4.2 scored high on the LAPTOP Battery Test, which consists of continuous Wi - Fi surfing with the
screen at 40
percent brightness.
The Galaxy Player 3.6's 1,500 mAh battery delivered strong endurance on the LAPTOP Battery Test, which consists of continuous Wi - Fi usage with the
screen set to 40
percent brightness.
That
screen is also brighter and more colorful, with an sRGB rating of 104.2
percent (its smaller siblings top out at 79.4
percent) and a
brightness max of 405 nits (the other Fire tablets only go up to 380 nits).
The auto -
brightness feature lowers the
brightness, but not enough; I had to dial the
brightness down manually to as low as 4 to 10
percent to get to passable contrast with the E-Ink
screen above.
When the
screen was turned down to just 20 -
percent brightness, text on the Nook was still crisp and clear.
A more significant bonus is the Spin 11's battery life: While it doesn't run our Windows - based performance benchmarks, the system lasted for 12 hours and 48 minutes in our video rundown test (playing a locally stored copy of The Lord of the Rings trilogy with
screen brightness at 50
percent and volume at 100
percent).
It's a 1,448 - by -1,072-pixel, 300ppi E Ink Carta
screen, with a 60
percent bump in
brightness.
Lenovo claims these will get 18 hours of battery if you turn the
screen brightness to 20
percent, but we're skeptical.
This test is run with the display on 40
percent brightness, so you'll get less endurance if you have the
screen on full
brightness.
Compared to the 4th generation, the
screen Reflectance decreased by 23
percent, the Peak
Brightness increased by 7
percent, and the Contrast Rating for High Ambient Light increased by 32
percent — all good.
A second problem is a bug that causes a 15
percent erratic variation in
screen Brightness, sometimes bringing the Nexus 7 Maximum
Brightness down to almost 300 cd / m2, which we classify as Poor for Maximum
Brightness.
Both tablets support LTE - A connectivity and features Super AMOLED Display that delivers a 94
percent Adobe RGB colour standard with a resolution support of 2048 × 1536 (QXGA) and features like Adaptive Display that auto adjusts gamma, saturation and sharpness and Reading Mode that adjusts the
screen's
brightness level for prolonged reading sessions.
In single -
screen mode, the Echo lasted an epic 8 hours and 26 minutes on the LAPTOP Battery Test, which involves continuous surfing over 3G at 40 -
percent brightness.
In our next test we set the
screen at 100
percent brightness, added Bluetooth radio, and used the handset heavily for a day, which included even more video watching, game playing, and leaving the
screen on and active.
For 2017, LG improved peak
brightness by about 20
percent, improved the lowest part of the black range, adding more subtle gradients for better shadow detail, changed the anti-reflective
screen coating so that the display looks deep black when turned off (instead of casting a purple hue as LG's OLEDs have in prior years), and reduced input lag down to about 21ms.
Under the duress of our more formal battery rundown test, which entails looping a video off local storage with the
screen brightness fixed at 50
percent, the Note 10.1 held out for a solid eight hours.
We recorded eight hours and 55 minutes in our video loop rundown test with the
screen set to 50
percent brightness — most folks will have little trouble getting a full day's use from the 1,800 mAh cell.
In more normal use, with power - saving turned on and the
screen at 75
percent brightness, I estimate you could get well over 11 hours, nearing the company's 12 - hour boast.
In our battery - life test with the
screen at 40
percent brightness and the keyboard backlight off, the Flip lasted 8 hours and 7 minutes.
In my own test — with YouTube continuously streaming, two Web pages refreshing themselves, and the
screen set to stay on at about 40
percent brightness — I got 10:17 and 10:48, respectively, in two tests, or about what you'd expect from an ultrabook.
At a peak
brightness of 602 nits, the XA2 Ultra's
screen can get roughly 15
percent brighter than the best phones in its class.
We found the
screen to be plenty bright enough in the fluorescent - lit PC Labs as long as the
brightness level was set to 90 or 100
percent.
Using our colorimeter, the
screen registered 432.8 nits of
brightness, displayed 121.9
percent of the sRGB color gamut and achieved a Delta - E color accuracy rating of 1 (zero is perfect).
That
screen is also brighter and more colorful, with an sRGB rating of 104.2
percent (its smaller siblings top out at 79.4
percent) and a
brightness max of 405 nits (the other Fire tablets only go up to 380 nits).
The optional, 2K HDR display rivals the OLED
screens we see on top phones as it reproduces 199
percent of the sRGB gamut and provides up to 500 nits of
brightness.
In an hourlong test, an iPhone 6s used 54
percent less battery power with the
screen brightness at minimum as compared with maximum
brightness.
During my time with my phone, I would spend a little more than three and half hours watching shows on Netflix, with six - hours of
screen on - time (I tended to have the
brightness setting at 70
percent of max
brightness during most of my time with the device.)
To give one example from my testing: I set the
screen to stay on constantly — as it would be if I were working solidly with no breaks — and set to 40
percent brightness.
With the
screen set to 65
percent brightness, it cycles through a series of websites until the laptop's battery gives out.
In this particular case, calibrating the
screen to 150 nits meant setting the
brightness of the S9 +'s
screen to 50
percent.
In use, our review unit's
screen was fine for general productivity work, but its glossy coating was a distraction, and it had to be cranked up to 100
percent brightness in some scenarios.