Battery Life

The Transformer Book T100 features an integrated 31Wh battery. As the keyboard dock doesn’t include an extra battery, that’s all you get. The good news is that Intel’s Atom Z3740 is built on the company’s first 22nm SoC process and it’s paired with LPDDR3. At least on the silicon front, the T100 should be fairly power efficient. Granted there are still the PMIC, display, WiFi and other components to worry about, but here’s to hoping ASUS did a reasonable job there as well.

Unfortunately ASUS delivered our T100 review sample less than 48 hours ago and I’ve been using it non-stop since then. I think I technically broke embargo by using it at a press event but it’s the only way I’d get enough time with the thing under my belt to feel comfortable writing about it. The bad news is that I only had enough time to provide a battery life teaser. I’m still running more data but for now all I’ve got is our WiFi web browsing test.

The T100’s results are presented with the keyboard dock attached and with the display calibrated to 200 nits:

Web Browsing Battery Life (WiFi)

Battery life looks decent at just over 8.5 hours on a single charge. In practice I had no complaints about battery life while using the device. It feels more like a tablet in that regard and less like a notebook, which is a good thing. Once again we’re seeing ASUS redefining what we’ve come to expect from an entry level notebook PC here. Even compared to Chromebooks we see the T100 do extremely well. I’m curious to get a better feel for how Bay Trail performs in the battery life department, which I’ll be doing over the coming days. So far the results look good but not quite stellar if you compare it to traditional Android/iOS tablets. I am curious to see how BT running Android would turn out.

CPU, GPU & Storage Performance Final Words


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  • RyuDeshi - Sunday, October 20, 2013 - link

    This is one of the reasons intel introduced the ultrabook specification. My Yoga 11s will standby/sleep for weeks before fully discharging on a relatively small battery (for a laptop). Reply
  • AsusJake - Sunday, October 16, 2016 - link

    windows computer operating system vs android os in terms of power consumption is a ridiculous comparison... Reply
  • ricardodawkins - Friday, October 18, 2013 - link

    Exactly... the man keep on harping about the stupid Chromebooks that are a complete FLOP. He talks about the 3rd party app situation of the MetroUI but what about the app situation for ChromeBooks ???

    Heck if you need a Chromebook just install Chrome on this Asus T100.
  • AsusJake - Sunday, October 16, 2016 - link

    exactly Reply
  • gsusx - Friday, October 18, 2013 - link

    Genuinely a bit stumped by people moaning about this. He said it's a great product with fantastic potential that is almost perfect. Lest we forget this is a tablet with a fully fledged os behind it. What do people expect for the price point. It's not a laptop replacement, then again a laptop is not a tablet replacement. For the money. For what you get its fantastic. It's a real middle ground machine. If you have a desktop or heavy duty laptop at home and want something portable but with the ability to do a bit more this thing is perfect. The Dell machines will be more expensive of that I have no doubt and the surface pro is double the money. You can argue about performance till you're blue in the face. Want impure over performance. Buy a machine and spend the money. You pays your monies you takes your choice. Personally I'm selling my MBA 11" to fund this. Reply
  • sri_tech - Friday, October 18, 2013 - link

    Well said. Reply
  • StormyParis - Friday, October 18, 2013 - link

    Exactly. I see it as a tablet that can double up as a laptop in a pinch. I'm still unsure about apps in tablet mode though: are there good apps for dlna, LAN, video... I'd hate to have to switch back to Desktop for Touch use... Reply
  • Belldandy - Friday, October 18, 2013 - link

    Good review especially with the limited time you had with the device. I'm looking forward to your full update. Here are a few questions I'd really like answered as well.

    Is the microUSB port only usable for charging or can an adapter be connected to allow things to be connected like the Nexus 4's usb port.

    Is the microSD card slot capable of supporting the microSDXC 64GB and larger cards?

    I'm assuming the micro HDMI can be setup for extended or cloned display like any other windows laptop.
  • StormyParis - Friday, October 18, 2013 - link

    I have an old HP 10" Netbook that is very small, a newer 13" Lenovo that I can't use in economy class... I guess the sweet spot for me is at 11.6", which is a pity because that Asus looks very nice for the price. Reply
  • teiglin - Friday, October 18, 2013 - link

    Thanks for clearly laying out the available storage--that was a big concern for a device like this for me. Two questions--of the 19 GiB occupied at boot, does that include the pagefile and hibernation file (which should admittedly be much smaller than on a typical machine with 8GB RAM)? And is the remaining ~10 GiB partition accessible at all? Obviously this is going to be a larger issue on the 32GB version--with the same 19GiB occupied, they obviously can't leave the entire remaining 10GiB inaccessible, so I'm curious how some of that storage is reclaimed.

    Also, am I correct that the pricing is $350 for the 32GB model and $400 for the 64GB, and that both include the dock? Your table is pretty confusing where it says "$349/$399 (including dock)"--makes it seem like the extra $50 gets you the dock, rather than extra storage.

    Anyway, it's an interesting device. Honestly, though, I remain unconvinced that the 10" form factor is worth anything at all; I can only assume it was spurred on by the iPad and all the me-too Android tablets that followed. Your experiences with the keyboard reinforce the fact that 10" is really too small for a clamshell, and smaller tablets have proven to be more popular for "sit back and read, browse the internet, and watch YouTube" experience--even Apple had to concede on the iPad mini front.

    I have both an iPad mini and a Galaxy Tab 7.7 and gravitate to my 13" ultrabook nine times out of ten, so I have concluded that I'm not a tablet person, but I'm watching with interest to see if the upcoming 8" Windows tablets can be successful.

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