ASUS Eee Pad Transformer Prime & NVIDIA Tegra 3 Review
by Anand Lal Shimpi on December 1, 2011 1:00 AM ESTBattery Life
With 39 hours to test I was pretty limited in what I could do when it came to battery life testing. I was able to run through two tests (one run a piece) and only in one configuration each. I wanted to see how Tegra 3 and the Prime fared in the worst case scenario so I picked the Normal power profile. Over the coming days I'll look at battery life in the other two profiles as well, not to mention run through more iterations of our test suite.
My bigger concern has to do with the malfunctioning WiFi in my review unit. For our video playback battery life test WiFi was on but not actively being used, those numbers should be ok. It's our general use test that loads web pages and downloads emails over WiFi and it's there that I believe things could've suffered a bit.
In both cases I saw around 9 hours of continuous battery life out of the Transformer Prime, without its dock. These numbers are a bit lower than the original Transformer but it's unclear to me how much of this is due to the additional cores/frequency or the misbehaving WiFi. The fact that we're within striking range of the original Transformer with the Prime running in Normal mode tells me that it's possible to actually exceed the Transformer's battery life with the Balanced or Power Saver profiles. That's very impressive for an SoC built on the same manufacturing process as its predecessor but with twice the CPU cores and a beefier GPU.
What I'm not seeing however is the impressive gains in battery life NVIDIA promised its companion core would deliver. I'm not saying that the companion core doesn't deliver a tangible improvement in battery life, I'm just saying that I need more time to know for sure.
That the Transformer Prime can deliver roughly the same battery life as its predecessor without any power profile tweaking may be good enough for many users. Both ASUS and NVIDIA shared their own numbers which peg the Prime's battery life in the 10 - 13 hour range. As I mentioned before, I'll have more data in the coming days.
Update - With a replacement Transformer Prime in house, battery life is looking a lot better already:
Update 2: Even more battery life results in our follow-up.
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Mumrik - Thursday, December 1, 2011 - link
I get the feeling Anand didn't enjoy the 39 hour thing :)Btw:
"The resolution is a Honeycomb-standard 1280 x 752. The 16:10 panel measures 10.1-inches diagonally,"
Huh? 1280x752?
That's not a 16:10 resolution...
Anand Lal Shimpi - Thursday, December 1, 2011 - link
It's technically 1280 x 800, the 752 is what you get when you remove the Honeycomb nav bar.mwildtech - Thursday, December 1, 2011 - link
Great Review Anand! Much better than Engadget's. We are lucky we still got nice sunny skies in Raleigh!SpacemanSpiff13 - Thursday, December 1, 2011 - link
Awesome review, Anand. I already had one preordered, but your review makes me really comfortable about my impulse buy, and it's not just a play for page clicks. Really solid, in-depth. Thanks.jwcalla - Thursday, December 1, 2011 - link
very well done reviewjjj - Thursday, December 1, 2011 - link
Nice to see a decent tablet and glad they didn't dropped (like some nutjobs) the microSD slot.Asus should really sell the keyboard much cheaper would help them gain considerable market share and maybe make one without the battery for 50-70$.And ofc bundle realVNC or Logmein with it.
TrackSmart - Thursday, December 1, 2011 - link
I agree that a cheaper keyboard option (or bundle w/ keyboard) would help sales.Regarding a version without the battery: the thing is already dangerously top-heavy when plugged into the dock. Can you imagine how bad it would be without the weight of the battery in there? They'd probably have to put some kind of weight near the front edge. Or use a design that connects the tablet further inward on the dock, as has been done on other tablets, which would ruin the laptop-like aesthetic (which is pretty nice).
Just my 2 cents.
jjj - Friday, December 2, 2011 - link
I was aware of that problem and amusingly enough i was also thinking about the same 2 solutions..The version without battery would be just to bring the price down a lot.The battery costs 20-25$ and that adds 40-70$ to the retail price so it would make a big difference.joe_dude - Thursday, December 1, 2011 - link
Personally, I'm not so interested in comparisons to the iPad. What I really want to know is how it compares to a tablet + netbook/ultrabook/MBA???If it can do a decent job in both roles, then it would really make life easier. Wouldn't need to sync files or deal with two different OSes. Save time and money.
Anand Lal Shimpi - Thursday, December 1, 2011 - link
Better than a netbook (what isn't? :-P) but not as good as an ultrabook/MBA for getting actual work done.Take care,
Anand