Toshiba Portege Z835 Battery Life, Heat and Noise

November 15, 2011 by Charles P. Jefferies Reads (169,201)
Editor's Rating

Ratings Breakdown (1-10)

    • Software & Support
    • 6
    • Upgrade Capabilities
    • 2
    • Usability
    • 7
    • Design
    • 8
    • Performance
    • 5
    • Features
    • 6
    • Price/Value Rating
    • 7
    • Total Score:
    • 5.86
    • Rating 1 to 10, top score 10

Heat and Noise
There is a single small fan located at the right rear of the chassis. It’s always on and makes a faint motor noise. In a normal room the noise will not be audible but it will be in a silent environment; fortunately those in the general vicinity are unlikely to notice. Nonetheless the fan should turn off when not needed and it would have been nice if Toshiba used a slightly quieter motor.

The actual temperature of the chassis is about the same regardless of what you’re doing; the cooling solution does a good job of keeping the notebook’s thermal profile under control.

Battery Life
I measured an even six hours of battery life during our standard rundown test (Windows 7 Balanced power profile, 70% screen brightness, wireless active and refreshing a web page every 60 seconds). This is a respectable time and in the range of what we expect from Ultrabooks.

Battery life test results (higher scores mean better battery life):

The Toshiba Portege Z835 is an all-around winner and was a pleasure to review. It has solid build quality, a decent backlit keyboard, a good touchpad, six hours of battery life, and the characteristic light weight (2.4 lbs) and thinness we’ve come to expect from Ultrabooks. Where the Z835 stumbles is performance; the included 128GB SSD is exceptionally slow. The Intel Core i3 processor is bottom of the barrel but should have plenty of oomph for general usage.

At $899 the Z835 undercuts existing Ultrabooks by $100 or more and makes for a very attractive choice. It is an ideal on-the-go companion and a tempting alternative to the Apple MacBook Air.


  • Decent backlit keyboard
  • 6 hours battery life
  • Great value
  • Plenty of ports including USB 3.0



  • Very slow SSD
  • No Bluetooth



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