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Onda v813 first impressions
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arrasmith
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2013/04/01 - 22:51
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Just a short initial impression of the v813 I got via DHL today. I ordered direct from onda-sale and it only took 6 days from the order till it was in my hands.

 

On look and feel. Physically this is a very nice tablet. 8.5mm it is over 1mm thinner than the v812 and the seams are all smooth and tight. It looks and feels great in my hand. One reason I got the v813 over the v812 is that I also liked the "more square" look to the curve of the back. It is thinner than my GS3 phone, which is amazing to me for an 8 inch tablet.

 

On software. It is running the 1.35 firmware and just playing around the A31 is much smoother than my Sprint GS3.

 

Hardware. The second reason for my getting the v813 over the v812 is the battery was upgraded to 5000 mAh vs 4500 mAh. The camera takes reasonable pictures in good lighting. Though the autofocus is rather twitchy in trying to change focus a lot more than it should. The performance for the A31 creates a very fluid UI.

 

[ Edit ... Below is the review I posted at onda-tablet when I was running the 1.35 firmware]

Physically this is a beautiful tablet. The aluminum body and the seams connecting the front and back body are very well made. It looks nice and feels great in my hand. 

Mine shipped with a screen protector already on. Like most screen protectors it had a plastic film to remove before use. The screen protector was put on better than I usually do. Nearly perfectly in place (probably off about .1mm) and only had 4 very small pieces of dust under it. Like I said, better than I have ever done. The protector itself was typical of the inexpensive types. A hard plastic that is easy to scratch. So I'll need to get a new one after awhile.

I've been running it today to see how long the battery lasts. The biggest use for this for me will be movies and music for long trips, books, games, and communication. So far a 2 hour movie played with MXPlayer's software decoder, the screen at 70% brightness, and no wireless used up 22% of the battery. Because most tablets will shut off around 5% that would give about 8.5 hours of movie time.

The UI is smooth. Though scrolling through web pages is not nearly as smooth as it could be. There is a visual jitter as you slide the page. It looks like a graphics driver bug to me. Also the tabs of the browser do not behave correctly. Their background image flashes a bit and they don't respond to clicks correctly. Hopefully this will be fixed with the new firmware. Chrome works well and using the advances side controls from the Lab section of the built-in browser settings work as well. I still need to try Firefox.

Wireless connections seem reasonable. Haven't had a lot of time to test it though. One thing I did notice is when I covered the bit of plastic on the top with my hand it would drop the signal strength. I'm assuming that the plastic is there for the antenna and I'm covering it up a bit.

Overall a nice tablet. And I'm looking forward to the improvements in the next v2.0 firmware (hint hint).

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heron61
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2013/04/14 - 10:24
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So, how has the V813 been to use?  What did the battery life turn out to be like.  I also saw a mention that the screen wasn't as good as the V812.  Does anyone know if there are any differences in quality or reliability between the V812 and the V813? 

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2013/04/14 - 23:52
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heron61 said
So, how has the V813 been to use?  What did the battery life turn out to be like.  I also saw a mention that the screen wasn't as good as the V812.  Does anyone know if there are any differences in quality or reliability between the V812 and the V813? 

I am typing this on my v813 now. Acutally I'm using a wireless USB keyboard. I had to modify the OTG cable because the v813's bevel sets the USB connection very deep. And I had to remove some plastic to get the OTG cable to plug in correctly.

 

I'll get my big complaint out of the way right up. Some applications will stall out as they download data from the wifi. Chrome and Play Store will at times. I'm guessing it is a wifi driver problem. But, when I would launch Chrome it would "hang" the tablet for 10+ seconds until it downloaded what it was working on. Very annoying. I just needed to be wait it out though and then everything would be fine. The Android Browser seems to be better.

 

I don't have a v812 to compare to for the screen. The v813's screen is sharp and bright. If a bit to reflective for my tastes at times. I'm facing the window as I type this during the day and I can see myself rather clearly in the reflection. I can see the screen fine as well. The screen is also a finger print magnet. And it does ship with a pre-installed screen protector. I haven't taken that off to replace it with a ZAG or more durable type because this one fits the entire face of the tablet.

 

I really enjoy using this. It is a great book reader for .pdf files (using ezPDF) and Google Books. I also use it for mathematics using Octave, Maxima, and LaTeX. Having a real keyboard to plug in really helps those. The performance of the A31 is incredible for the mathematics software. I don't have a micro HDMI yet. But, this would be a great travel tablet for giving talks and presentations (using LaTeX to pdf creation).

 

As far as battery life I get a day out of it without many problems. If you are interested in movies, you should get 4+ movies out of it without a problem. I really ran dead dead only once. And it had problems turning back on. So I would recommend only letting it drain to 10 percent before plugging it in. I haven't streamed internet movies yet. I'll go ahead and stream about an hour tonight and let you know how much it drains.

 

Just thought of another bug. When I plug in a USB thumbdrive or plug it into a computer it will forget programs after I'm all done. I have to reboot it and then everything is back to normal. I haven't tested exactly what is happening. My guess: the internal 16GB is divided into two partitions. And a mount/unmount command seems to get it to forget the apps that are on the second partition. This is just a guess for now though.

 

Overall I'm happy with it. It takes reasonably good pictures outside (small lens cameras need lots of light). It has very good performance. And right now the firmware only has the two main problems: applications+wifi stalls and forgetting apps.

 

Mark

 


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heron61
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2013/04/15 - 02:19
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Thanks muchly for the info.  I'd almost decided to get a v812 because I've seen awesome reviews, where the only drawback is the impressively mediocre battery life.  The v813 sounds like it has a fairly good battery life, so I'm now going to wait for a few more reviews to decide.  Honestly, it sounds like neither one is a bad choice.  

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2013/04/15 - 05:11
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Ran Netflix for an hour. Audio at 50%. Screen at 75%. And the battery only drained 8%. So that would give about 10 hours run time. I've been on websites, then read a book on Aldiko, and then an hour of Netflix. And that burned 49% of the battery in 5 hours with some of that being idle.

 

So I would guess 8 to 9 hours being typical run time.

 

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heron61
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2013/04/15 - 07:31
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Wow, that's at least twice what most of the reviews say about the v812, so either the v813's battery is a lot larger, it's far more efficient, or the 3.5-4.5 hours that I've repeatedly seen as the v812's battery life is simply incorrect.

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arrasmith
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2013/04/15 - 20:23
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heron61 said
Wow, that's at least twice what most of the reviews say about the v812, so either the v813's battery is a lot larger, it's far more efficient, or the 3.5-4.5 hours that I've repeatedly seen as the v812's battery life is simply incorrect.

The v813 has a 5000 mAh battery versus the v812's 4500 mAh. And the 2.0 firmware is supposed to help with battery life as well. And I'm running that firmware.

 

Overall total battery life is affected by lots of factors. When I was running Netflix I was only two rooms away from my router. If I had a weaker signal it would require more power from the tablet. A screen at 100% is another large power draw. And the batteries drain curve is also very important.

 

The v813 battery is basically done at 5%. And I didn't run it down from 100% to 5%. The drain may be steeper in the 20% to 5% range. Cheaper batteries sometimes are.

 

If it helps your decision ... I'm running it without wifi right now. Screen on at 100% brightness. Playing music. And Octave using 2 of the 4 cores at 100% each on a benchmark script. That has dropped the battery from 100% to 83% in 65 mins. This will probably drop the battery dead in 6 hours.

 

I don't have wifi in my office. If I could add Netflix I wouldn't be surprised to kill it in about 5 hours. I just added a movie being played of an external USB drive to see how that adds to the drain. My guess is dead in 5 hours.

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2013/04/15 - 20:34
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I should also say I'm really impressed with the A31. With all that I'm doing mentioned above the tablet remains responsive and smooth. The movie is a 1.4GB mp4 file and is running as if it hasn't lost 2 CPUs to Octave. The CPU performance for Floating Point math is obviously nowhere near an x86 box. But is effective for non-research level coding and Integer math is really good.

I would LOVE for this tablet to supported by Ubuntu Tablet or Pengpod. That would kick ass.

My dream tablet: Onda v813 with a digitizer+pen (like the Galaxy Note's) running a Linux distro based on KDE's Plasma Active. Now that is a tablet I could teach with ... Maybe someday. I'd also take an Android driver for a Wacom Bamboo tablet though.

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2013/04/16 - 00:18
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v813 Battery Life

Well I ran it pretty hard today. And I learned the the biggest drain by far is the screen's backlight. Leaving the screen on at 100% brightness, always on, running movies off a USB flash drive, and two CPU benchmarks running in the background would drain the battery in just over 4 hours. The back metal case as warm for the first time as well.

I decided to change things up at 3 hours (and with 27% battery left) and drop the brightness to half. That changed the drain from about 25% an hour to only about 15% an hour. Which is huge.

Basically, if I want to have good battery life I just need to keep brightness around 50 to 70 percent. Which is where I normally had it anyway. 

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obeguin
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2013/04/26 - 10:54
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According to m,y experience, if you are a moderate user, I think the battery life of the onda v813 may be between 5-6 hours...

 

I'm also using Greenify ( but you need to be Root o use it )  to be sure my apps hibernate when the creen is off and to avoid some of unnecessary battery drain...

 

And i'm also using CPU sleeper to be sure that when in deep sleep, only one CPU is working thus using less battery.

 

 

 

 

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2013/04/26 - 10:58
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I'd like to publish some battery life benchmarks following the same framework we used on other tablets

(see here: http://www.arctablet.com/blog/featured/archos-gamepad-battery-life-tests/)

I'm looking for one or two V813 owner to run those tests, if anyone would like to help, please let me know and I'll post the test protocol in the forum. You won't have to do much work, just let the tablet run... Wink

Cheers.

If you like our web site, applications and firmwares, feel free to support our site. Donations are used to pay the bills for our server hosting costs, development tools and purchase new tablets to support.

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obeguin
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2013/04/26 - 11:41
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just let us know ow to do it and I be happy to o them. it shulnt be  problem...

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dj_vadim
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2013/04/30 - 13:12
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Please who have 812 and 813 test some games like Gta Vice City,Csr Racing,real racing,etc... but test it for 10 -15 min and tell me if after this times 10 -15 min you have Big LAGs, because i have buyed a 812 and i have lag after 5 min with the 812 in GTA  and i have sold it and i dont now what to do if buy a 813  or buy another Brand because i dont like this LAGs with that hardware please reply me 

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G.Hall
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2013/08/03 - 14:30
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Any other reviews / opinions from people having had longer experience now with the Onda V813?

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