Dell Inspiron 15 Battery Life

Dell shipped our Inspiron 15 review unit with their standard 6-cell, 48Wh battery and advertise it as being able to hit up to 3 hours and 43 minutes of running time. For our battery life testing, we set the screen's brightness to a measured 100 nits.

Battery Life - Idle

Battery Life - Internet

Battery Life - DivX 720p

Battery Life - x264 720p

Relative Battery Life

The running time of the Inspiron 15 isn't exactly breaking any records, but it's not a showstopper and Dell should be commended for at least a measure of truth in advertising. Leaving the computer idle at about 30% brightness in the software settings resulted in a battery life two minutes longer than what Dell advertises. When we put the computer to basic use, we get a touch over three hours, which is just about the bare minimum of what a modern notebook should be able to provide. When video playback enters the equation, however, battery life takes a swan dive, losing a full hour of running time. The Inspiron 15 is still managing two hours of useful life, though, just long enough to watch a movie before having to put the machine into standby.

Dell Inspiron 15 Gaming Performance Dell Inspiron 15 LCD Quality
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  • autoboy - Friday, March 5, 2010 - link

    I received my 1464 the day you reviewed the 1564. It's the same laptop but with a 14" screen.

    Mine has the Core i5 430.

    I use an external monitor 95% of the time so the poor quality screen isn't a problem. It's actually better then my old HP. I don't mind the lack of expresscard since I've never used it. I use a usb hub for my peripherals so only 3 ports is fine. I actually didn't notice the 100mbit ethernet, but oh well. I'll eventually upgrade to N wireless but my router is G so the G doesn't bother me for now. I'm happy with the quality and features. All I wanted was a cheap 14" laptop with HDMI and the Core i5 without a graphics card. That's what I got.

    BUT, the fan on my laptop is constantly turning on and off. It is SO annoying in a quiet room and it is driving me nuts. I'm sitting here in my office not working, and thinking of a way to build a stand for the laptop with a quiet 80mm fan that blows directly into the air inlet so the fan will never ramp up. I've studied the CPU and the fan turns on at 27C (why can't it go to 50 before turning on?) and turns off at 20C a minute later. Then it climbs to 27, the fan turns on, and then it turns off at 20C.

    I can't find a fan control program that is able to control the fans. I can't find a program that is able to undervolt the processor. I just spent $30 on a laptop cooler with movable fans. If that doesn't work I'm building my own with some wood, a 5V wall wort, and some foam. Dell, it is UNACCEPTABLE to build a computer that changes the way it sounds just sitting there doing nothing. Learn how to program a fan control system. This is my last Dell. Every notebook from now on, I'll have to touch and wait around for the fan to stabilize before I buy it.
  • mikecel79 - Friday, March 5, 2010 - link

    I'm looking at the new Studio 14 with the Core i3/i5 CPUs but haven't found a good review of it yet. It's got the same CPUs but can be had with a Radeon 4530 and 7200 RPM drives.
  • Pirks - Friday, March 5, 2010 - link

    "Dell's designers seem to understand the importance of user experience extending beyond simple metrics like system performance"

    So Dell's designers are much MUCH smarter than most of the DT readers :P
  • jabber - Thursday, March 4, 2010 - link

    I've been using the similar equiped (ports wise) Inspiron 13Z for the past 5 months and to be honest I've havent missed having a PCMCIA/Express port or a fourth USB port at all.

    I think Dell have done some research on what parts most users need/use and found that (especially Express port) they just arent needed.

    This range of Inspirons are really great.
  • Iketh - Thursday, March 4, 2010 - link

    this article was hard to read... far too wordy... detailed, but not enjoyable
  • ezinner - Thursday, March 4, 2010 - link

    No 7,200 RPM HD
    No Gigabit Ethernet
    4 Hour Battery
    Sub $1,000 cost
    If the ending price was $579, it would be a good deal.
  • Wadzii22 - Thursday, March 4, 2010 - link

    I have had 2 of the older 1545's, one with the 768 screen and one with the 1600x900 screen... spring for the better screen, its well worth the price, and these things can be had for much cheaper through the outlet.
  • T2k - Thursday, March 4, 2010 - link

    ...did Dell actually ask you to "review" this unit? Because if they did, they are not happy, I think. :D

    Joking aside please, take a look at this gem: http://www.jr.com/acer-computer/pe/ACE_AS5740G6979...">http://www.jr.com/acer-computer/pe/ACE_AS5740G6979...

    Good brand, killer i5-based (2.26GHz) config including latest DX11 Mobility Radeon 5650 1GB, for $750 (faster 2.4GHz adds $100 more) - I'm pretty sure anyone interested in a decent laptop would love to see the results...
  • Crucial - Thursday, March 4, 2010 - link

    Did Acer ask you to pimp this system? It's the second time you've linked to it in this post.
  • T2k - Thursday, March 4, 2010 - link

    Or perhaps simply because I THINK IT IS A GREAT DEAL and I want people to know about it?

    Stupid moron.

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