CNET tablet battery life results

Your tablet might pack a fancy stylus or super-sharp resolution, but can it go a day without a charger? CNET Labs takes up the challenge to find out.

The battery life of a tablet can range anywhere between 5 to 13 hours. Xiomara Blanco/CNET

Editor's note:This list is updated regularly.

Battery life testing is one of the last evaluations we subject tablets to at CNET Labs, but by no means is it the least valued. How long you can use your tablet is nearly as important as what it is you do while using it.

Our CNET labs testing standards ensure that all tablets, regardless of size, color, or operating system, are tested as close to equally as possible. Details on how we test tablets are included below the testing results chart. We've also thrown in each tablet's maximum luminosity, resolution, and pixel density for good measure.

For easy tablet comparisons, click on the arrows above the specifications to re-organize the chart from highest to lowest, or vice versa. Expect this list to be updated frequently as new tablets are tested.

To see what tablets are coming down the pike, check our upcoming tablets list , which gets updated every week.

Tablets in the process of being tested say "IP" and results with keyboard docks appear in parenthesis.

Model
Video battery
life (hours)
Maximum
brightness
(cd/m2)
Resolution
Pixel
density (ppi)
Screen size
(inches)
Acer Iconia A1-810 7.5 285 1,024x768 160 8
Amazon Kindle Fire
HD (2013)
9.3 421 1,280x800 216 7
Amazon Kindle Fire
HDX 7
9.8 430 1,920x1,200 323 7
Amazon Kindle Fire
HDX 8.9
IP 472 2,560x1,600 339 8.9
Apple iPad
(fourth generation)
13.1 n/a 2,048x1,536 263 9.7
Apple iPad Air 13.2 421 2,048x1,536 264 9.7
Apple iPad Mini 12.1 n/a 1,024x768 162 7.9
Asus Eee Pad
Transformer Prime
9.6 (15.3) 570 1,280x800 149 10.1
Asus Fone Pad 7.3 242 1,280x800 216 7
Asus Memo
Pad HD 7
9.7 353 1,024x600 169 7
Asus Transformer
Pad TF300

(Balance mode)
8.7 (13) 331 1,280x800 149 10.1
Asus Transformer
Pad Infinity TF700

(Balance mode)
8.5 (13.9) 422 1,920x1,200 224 10.1
Barnes & NobleNook HD 7.3 455 1,440x900 243 7
Barnes & Noble
Nook HD+
9.5 496 1,920x1,280 256 9
Dell Venue 7 7.7 342 1,280x800 217 7
Dell Venue 8 7.9 356 1,280x800 189 8
Dell XPS 10 9.6 (15.7) 335 1,366x768 155 10.1
EVGA Tegra Note 7 IP 423 1,280x800 216 7
Google Nexus 7 (2013) 11.5 570 1,920x1,200 323 7
Google Nexus 10 8.4 368 2,560x1,600 301 10
Hisense Sero 7 LT 6.2 242 1,024x600 169 7
Hisense Sero 7 Pro 8.4 320 1,280x800 215 7
HP Slate Book x2 IP 350 1,920x1,200 226 10
Lenovo IdeaTab A1000 4.6 369 1,280x800 216 7
Lenovo IdeaPad
Yoga 11
12.6 232 1,366x768 135 11.6
Lenovo Yoga
Tablet 8
14.2 438 1,280x800 209 8
Lenovo YogaTablet 10 12.4 435 1,280x800 167 10
LG G Pad 8.3 6.4 289 1,920x1,200 273 8.3
Microsoft Surface Pro 2 6.9 n/a 1,920x1,080 208 10.6
Microsoft Surface 2 11.6 315 1,920x1,080 208 10.6
Nokia Lumia 2520 IP 676 1,920x1,080 218 10.1
Samsung Galaxy
Note 8
IP 458 1,280x800 182 8.3
Samsung Galaxy
Note 10.1
9.6 411 1,280x800 149 10.1
Samsung Galaxy
Note 10.1 (2014 Edition)
6 326 2,5601x1,600 298 10.1
Samsung Galaxy
Tab 2 7.0
7.1 379 1,024x600 170 7
Samsung Galaxy
Tab 2 7.0 4G LTE
8.4 454 1,024x600 170 7
Samsung Galaxy
Tab 2 10.1
6.2 380 1,280x800 149 10.1
Samsung Galaxy
Tab 3 8.0
10 395 1,280x800 189 8
Samsung Galaxy
Tab 3 10.1
8.3 421 1,280x800 149 10.1
Sony Xperia Tablet Z 7.2 411 1,920x1,200 226 10
Toshiba Excite 7 IP 340 1,024x600 170 7
Toshiba Excite Pro 7.9 301 2,560x1,600 302 10
Toshiba Excite Pure 6.3 284 1,280x800 151 10
Toshiba Excite Write IP 335 2,560x1,600 302 10

How we test tablets

In the CNET Labs, we currently run two different tests to evaluate the performance of non-Windows tablets.

Battery life
We evaluate battery life by continually running a movie file on the tablet until its battery dies.

We set each tablet to Airplane mode and adjust its respective brightnesses to 150 candelas per square meter (cd/M2) or as close to that number as possible.

For the iPad, we run the iPad version of "Toy Story 3." On Android tablets, we run a 720p version of "Toy Story 3." The reason we chose 720p for Android was that not every tablet can run 1080p video just yet, and we wanted to make sure we tested Android tablets under the same methodology.

On the iPads, we ran the movie through the iPod app; for Android, we used the movie player apps mVideoPlayer or DicePlayer, as they provide a much-needed repeat video function that not all native Android movie players include.

*The Barnes and Noble Nook Tablet reflects continually streaming video through a wireless connection. The router was approximately five feet away with a full signal. We used the Netflix application to stream "Amadeus" and when the movie ended it was manually repeated, due to a lack of repeat video function available.

Contrast ratio and brightness
We also tested the maximum brightness, default brightness, and contrast ratio for each tablet. We conducted these tests using the Minolta CA-210 display color analyzer. With each screen at full luminosity, we placed the sensor in the middle of the screen. We used a completely white screen to test the brightness and a completely black screen to test the black level. We then divided the maximum brightness by the maximum black level to get the contrast ratio.

 

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