Battery life of dv5000

I just read review about HP dv5000z from cnet.com. It says battery life of this laptop is only 2.5hours with 6-cell battery. how come is it so short with new intel core duo? I also read that Lenovo T60's battery life is over 6hours with 9-cell battery. 6-cell and 9-cell are really that different? If I order HP dv5000 with 12cell battery, how long would it last? I like hear some answer from people who owns HP laptop.

 

The dv5000z is not the core duo, it's an AMD Turion 64.
You will find the core duo in the dv5000t, which has an estimated battery life of about 5.5 hrs with a 12-cell, i think.
I have a dv5000t with a 12-cell on the way, I can let you know how it is when I get it if you would like.

 

I had a 5000z 12cell battery lasted 3.5 hours just doing desktop and internet applications. HP says 5.5 hours. I returned the notebook.The two usb ports on the left side are weak with no support. They would be better if they were side to side instead of up and down.

 

I also have the dv5000z and get 4.0 hours from 100% to 2% battery charge with the 12cell just doing the desktop and internet applications.

 

These results should not be representative of the 12 cell battery. With proper/optimum settings it should suffice for 5 hours; undervolting will probably add another 30min or more.

As for the 6 cell - depending on which version you have (4.0ahr or 4.4 ahr) you should have between 2.5h and 3 hours with undervolting. There really is no reason why one should not undervolt any ML processor.

 

This review is claiming 7.5 hours on the 12 cell for the dv500t with the core duo and 7400 Go video card...

http://laptopmag.com/Review/HP-Pavilion-dv5000t.htm

...I'm hoping for 3.5 on the 6 cell.

 

Wow if it actually got 7.5 hours that would be insane.

 

Hi All,
Is there some standardized test format that is used to establish battery life? The reason I ask is that when playing Doom3 I get about 1.5 - 2 hours run time on a charge. Yet by the same token if I shut down the wireless, use a cat 5, and don't mess with the DVD burner I get 2.5 - 3 hours. This is a significant difference and yet the battery and the machine are both functioning correctly. So throwing out numbers on battery life without a standardized set of parameters is pretty much useless for more than a rough estimate of run time per charge.

 

I think for the factory ratings on battery life, they turn down the screen brightness all the way, and just let the laptop sit there doing nothing.
Thats how they get such high numbers.

 

On a somewhat related note, when comparing battery life between notebooks from different manufacturers it is important to note the voltage rating of the battery and not just the amps/milliamps per hour, or the amount of cells.

HP notebooks seem to come equipped with a battery that is rated at 10.8 Volts, however other manufacturers like IBM use a battery that is rated at 14.4 Volts which would translate into a greater watts/per hour (substantially longer batter life) if the amps rating of both batteries are the same.

 

I second that, very good point !

 

Did you know that cat 5 (1000mbps) sucked up more power than wireless 802.11b ?

Somebody did the test with various component, they enabled/disabled every possible device on a laptop, and measured battery life. Then they somehow estimated power consumption of these devices. The conclusion was that their gigabit ethernet was consuming more power than the internal wireless card.

Interesting

 

Hi Wipeout,
That reinforces what I said. If there is no standard way of determining battery life then all the numbers are good for is rough guesstamate of what a user can expect. There should be a standard test suite for battery life say idle after 30 mins of Doom 3, 15 minutes of DVD run time, with wireless connection on at all times and screen brightness set to 80%, for example.

 

I like this way for measuring battery life:

Let brightness on maximum, wireless enabled. I let the laptop idle in windows, by taking attention to not let power saving features kick in.

It lets shine the processor's power saving features.

It's not really reflecting real-life usage, but it's close to. At least it's easy to reproduce ..

 

Hi Wipeout I agreee. The idea is not to imitate real life, though that would be nice, but develope a standard that would give a fair representation of the battery life using the standard. There bench mark test for just about everything else, I don't see why the same isn't done for something so important as the battery life on a laptop.