Higher capacity (7800mAh) 9-cell for w7j

Just looking at proportable it seems like the 9-cell battery for the w7j is a 7800 mAh unit, while the older 9-cells were 6600 mAh. Is this figure right? Is the battery larger than the older 9-cells for the w5 and m5? Also, does the z35 use the same battery format as the w7? Anyone know?

 

Yes, that is correct. We don't have 9 cells for the Z35 in yet, but the 6 cells for both the W7 and Z35 are both 4800mAh, which is what the W5 6 cell's were..... but the W7 9 cell certainly is 7800mAh..... I'd say that I'd assume the Z35's 9 cell is the same, but that may be dumb... they may be the same as the 6600mAh W5 9 cell's... but I'd doubt it.

 

4800mAh/3hours=7800mAh/xhours

x=4.875hours

Does algebra work on battaries??

 

I would say that is a pretty good estimate...

 

Mmmmmm 5 hours *Drools*

 

Wow if the 9 cell can get 5 hours (i get a little over 3 hours on my w7j on 6 cell now) that'd be awesome

I'm really really tempted. 140 at Proportable eh? Hmmmmmmmm

 

Keep in mind... no one has emphatically stated that my algebra is correct when applied to battary usage!!

 

That's close.. .but that's if you're really using the W7.... I mean even someone who's getting 3:30 out of their stock battery would get more like 6 hours out of it.

 

Just curious, did disabling the webcam on the w7j end up improving battery life? If so, by how much?

 

If you look at the USB root hub, you will see that the USB webcam is claiming 500mA so at 5V, that is 2.5W.

 

I have tested it, and can find no discernable savings in battery life. I'm sure there is some theoretical savings, but I can't notice it in real terms.

 

At 6 hours, this machine is amazing!!! Bring the 6 cell and you can leave it on almost all day!

How much does the AC adapter weigh for the W7??

 

When I turned the web cam off my battery life went from just under around 2:50 to 3:15.

 

Yeah, that's about right.... great, but right... Same thing happened when you turned off the cam on the W5... They eat battery... they do. Since most people will never use it, that extra life is great, but I have to ask what you're doing to be getting only 2:50 out of that battery? Are you running full cpu? Doesn't nvidia have their power saving features on the gpu like ATI does? (I honestly don't remember checking on that system).

 

yes nividia has powermizer.

i'm getting a little over 3 hours on 6 cell with 3rd-4th level (from bottom) brightness, power saving mode on both powermizer and NHC. webcam disabled. wifi on bluetooth off. Just typing/browsing and stuff.

Does that sound about right or should I bet getting more?

 

MrBamboo - I get about the exact same. So it sound about right to me.

 

What kind of work are you doing?

 

Not sure who you are asking. But for me, I get just over three hours doing Word/email/firefox stiff.

That is with RMClock set to "Power-Saving" (6x multi @ .950v), PowerMizer set for "Maximum Power-Saving", LCD on 1/4, Webcam and LAN, wifi/bluetooth on.

 

Well, I was talking to both of you really..... That's ok, but I think you can do better....... basically you're running at 800mhz then? As long as you're not using it at the time, I'd shut off the camera, turn off the lan and bluetooth until you need it and wifi can be left on without a problem.... 25% on the screen is what I use a lot - I'm glad to see someone else comfortable at that level. People buy computers from us and then are unhappy with the battery life when they run their cpu at full blast and their lcd at 100%...... just because it goes to 100% does mean it should or at least should in a normal situation.. it's for outside or really bright areas. But still people say well that's what I paid for........ our response is usually, well you're getting what you paid for, but if you want better battery life, you have to be realistic about the whole thing.

Do about the same, I'd say 3:30 should be doable and I think that's what I've been getting, maybe even a little better but I tweak so many things I don't even know remember half of them, let alone think of a way to communicate those through the forums, but anywhere between 3 and 3:30 are good for the power behind the system.... but still you should get slightly better.

 

Justin can u please confirm that u have this in stock :
Product Name: Optional 7800mAh (9 Cell) Battery for Charcoal W7j
Product ID: 90-NHQ2B2000

thanx

 

Please don't ask me to confirm stock....... sales has an easy email address and phone number........ but more so, add a product to your cart and the exact stock is listed. We had them, but do we have any left... I'm at home and can't tell you any more than the website states. I grabbed one today for myself and even I need to scan it out so it's taken out of inventory, but there were some left and I doubt they're all gone.

 

I wonder how far out the 9-cell sticks out from the back of the notebook.

 

Hey, I have my w7j at 6% brightness, powermizer set, turned off the bluetooth and the webcam, and am using the computer for some typing and light firefox usage and I barely get 3 hours. Is there something else I need to do? Oh, and by "light firefox usage" I mean reading news articles, email, and of course notebookreview. I have also tweaked around with NHC but it doesn't go below .9500v so I just have it turned off and am using the power4gear profile right now.

Oh, and I might add that at 6% brightness it does strain the eyes after an hour of usage. BTW, Justin mentioned to turn off the lan. How would I go about doing that? Thanks.

 

....... 6% is awfully low, but on the W7's backlight, brightness isn't as important as it would be with a system like the W2..... the difference between 25 and 100% brightness on that could be 45 minutes..... not so on the W7. The prismatic mirrors must have a lot to do with that..

CPU usage is important..... and locking yourself down to 800mhz is probably better in normal situations than having it automatically set because it sometimes goes up higher than you'd expect and it isn't *always* what you need.... Everyone is going to be different and if you're within 15% on either side of 3 hours on that machine, I wouldn't be concerned.

 

I think bluetooth uses a bit of power, but the I use a bluetooth mouse.

 

... well if you're using a mouse, you're probably at a desk or something, so plugging the system in isn't a problem, or at least getting power over time wouldn't be... but bluetooth does use a bit of power... more than wifi for sure.

 

How would I go about getting this 800mhz that you speak of? I have NHC on right now and it says anywhere between 995mhz and 998 mhz.

 

ok, well with powergear, email mode is 800mhz.... it would be the lowest multiplier in NHC... but even under 1.0ghz is fine, there isn't going to be a huge power jump there.

 

I only have one AC Adapter. It stays at home. The battery is used in my office, at Starbucks, etc.

I'll be getting the large capacity battery when it is available for Canadian delivery.

 

are you sure? the lowest multiplier/voltage on NHC is 998MHz/.95volts for me. would this me p4g will save me more power than NHC?

 

To answer justin: I generally have a song playing while i'm firefoxing and typing, sometimes a video, if i'm just online i can hit around 3:30

 

The core duo's will get down to 800mhz, I'm fairly certain, otherwise I don't know what I've done...... maybe I'm confusing systems, because I know the banias cpus went down to 600... the dothans 800, but I swore the core duos were hitting 800 as well, but like I said, 800 to 950 or something isn't bad anyway....... but powergear may be set up differently.

intenet, word, email, im..... that sort of easy, normal stuff should get you close to 3:30..... you can't really use the notebook at lighter, but at the same time there are some people who basically don't do any more than that, so that may be a tough day for someone.