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9750 car adapter?

post #1 of 21
3/28/06 at 3:55pm
Thread Starter 
I am not entirelty sure a power inverter exists that can handle the needs of the 9750 and go through the cigarette lighter in a car...

Any body know?

i have looked at 350 watt power inverters, but they have to be connected directly to the battery, and that is not going to happen...

Or am i mistaken, and i do not actually need a 350 watt power inverter?
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post #2 of 21
3/28/06 at 7:10pm
350 watts?


Where'd you come up with that number? That sounds really excessive.
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post #3 of 21
3/28/06 at 9:30pm
Inverters of that size are easy to find. I have found that they must be connected directly to the battery. Although a bolt on connection is not really necessary, i have made due with the miniclamps usually provided.

Amp input on PS *110 volts = necessary watts
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post #4 of 21
3/30/06 at 10:19pm
I purchased a 350W car inverter (it can plug into the DC 12V of the CAR BTW) and that was NOT enough to power the 9750 with an FX60 processor and the 7800GTX. If you do the conversion the power consumption is actually a wee bit over 360-380W when peak, needless to say you will drain your battery (although slowly) as the computer cannot keep itself charged off of that current.

I believe the power consumption is 3.1A * 120V = 372W which is shy of your goal and speaking from experience it won't work. Mine was purchased through walmart for around 60 bucks and then taken back. I still use the nice little 100w power inverter (very small) however for my Dell i6000.
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post #5 of 21
3/30/06 at 10:27pm
do not plug into a cigarette lighter with your 9750!! i did this with my 9860 and i blew the damn cigarette lighter and had to replace it. you must connect to a battery.
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post #6 of 21
3/31/06 at 1:38am
Thread Starter 
An update-

I can do minor computing, install things, surf the inter net when running on an inverter that sounds an alarm if the laod goes over 150 watts.

Max consumption, would be 372 watts according to the calculation methods here, and i had no chance of runing a gme on in....the inverter shut off as soon as the character selection screen came up for oblivion.
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post #7 of 21
4/1/06 at 4:51pm
Quote:
Originally Posted by Argh
do not plug into a cigarette lighter with your 9750!! i did this with my 9860 and i blew the damn cigarette lighter and had to replace it. you must connect to a battery.
Then you had a problem with your cigarette lighter as that should have blown the FUSE and not the entire lighter itself. Most cig lighters are good for 15AMP @ 12V - on a 350W inverter it is pulling 3.1A @ 12V which is MORE than enough to satisfy the requirements from a lighter port. As stated before however the 9750 pulls MORE than 350W and is more around 370-380 give or take. In either event the lighter fuse should have blown out if there weren't other issues that needed to be dealt with first.
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post #8 of 21
4/2/06 at 11:09am
Quote:
Originally Posted by SpartanVIII
I am not entirelty sure a power inverter exists that can handle the needs of the 9750 and go through the cigarette lighter in a car...

Any body know?

i have looked at 350 watt power inverters, but they have to be connected directly to the battery, and that is not going to happen...

Or am i mistaken, and i do not actually need a 350 watt power inverter?

I've been using a Coleman 400 watt inverter for the past month with
a loaded 9750. Haven't blown any fuses and it does run off of the
cigarette lighter.

--Bob
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post #9 of 21
4/3/06 at 1:08pm
no the fuse within the lighter itself blew, not the other fuse and the cigarette lighter had to be replaced. it would have been a very costly mistake but my car warranty covered the incendent.
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post #10 of 21
4/3/06 at 7:59pm
Quote:
Originally Posted by gerdawg
Then you had a problem with your cigarette lighter as that should have blown the FUSE and not the entire lighter itself. Most cig lighters are good for 15AMP @ 12V - on a 350W inverter it is pulling 3.1A @ 12V which is MORE than enough to satisfy the requirements from a lighter port. As stated before however the 9750 pulls MORE than 350W and is more around 370-380 give or take. In either event the lighter fuse should have blown out if there weren't other issues that needed to be dealt with first.

I'm curious how did you determine the 9750 is pulling around 370-380
watts?

---Bob
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post #11 of 21
4/3/06 at 8:53pm
What about the 5720? How much wattage does it require?
I don't really want to shell out $60 extra for a car adapter if I can get it separately for less.

Thanks,
Gerry
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post #12 of 21
4/4/06 at 5:29pm
Quote:
Originally Posted by palowoda
I'm curious how did you determine the 9750 is pulling around 370-380
watts?

---Bob
_____________

Well the PSU says 3.1A and the end result AC current is 120v

3.1A * 120V AC = 372W

I then just assume it will fluctuate a bit based on current voltage (air conditioner, etc). Not ALL cars put out 12v some put out less others put out a 14.4 v (which is really what the battery should put out) so this may change your current wattage out to that assumed rate.

The general thing to go off of is that it's 372w basically which the 350w car inverter will not support as per the threads title question.
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post #13 of 21
4/4/06 at 7:02pm
if you care to read my thread, i think it will answer all of your questions as i had to go through the same thing.

http://www.notebookforums.com/showthread.php?t=71479
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post #14 of 21
4/4/06 at 8:51pm
Good read, but I think they started losing track of things a bit personal.

First and foremost it was mentioned that the PSU can pull 20a which to me is kind of funny. That would mean just plugging a laptop into a wall @ 20a would pretty much just bring that circuit down with anything else on it.

Just to make it simple your output is anywhere from 370w-380w I would believe that a quality 400w inverter would cover this without a problem. There is really no doubt in my mind on this as after I bought the 350w and it didn't work I borrowed a 400w and the issue was resolved. The 350w tended to just coast the laptop along on power while the battery still drained @ about 23w give or take. Sooner of later @ 350w the battery will run dead on the laptop.

If you get a 400w (quality) your sure to alleviate this problem.
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post #15 of 21
4/4/06 at 9:08pm
Quote:
Originally Posted by gerdawg
Well the PSU says 3.1A and the end result AC current is 120v

3.1A * 120V AC = 372W

I then just assume it will fluctuate a bit based on current voltage (air conditioner, etc). Not ALL cars put out 12v some put out less others put out a 14.4 v (which is really what the battery should put out) so this may change your current wattage out to that assumed rate.

The general thing to go off of is that it's 372w basically which the 350w car inverter will not support as per the threads title question.

Well the power factor on the Sager AC/Battery charger
must be very inefficient as it's rated to deliver only 220 watts.
I suppose there is real and appearent power to consider
on the ac side. I even run more than just the 9750 off
of the 400W inverter I have. By the way I made a mistake
in the brand of inverter I was using in a previous message.
I said it was a Colman it's actually a Vector.
http://www.vectormfg.com/catalog/vec...rter-p-59.html
I even had two laptops running off of it but it's just barely
kicks in the alarm. Does the 98xx Intel Sager series
have a different supply adaptor? I suspect it might
consume more than the 9750 series to begin with.

---Bob
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post #16 of 21
4/5/06 at 2:51am
i'm not sure on the 98XX series.

I was only trying to install WinXP (the day after I recieved my laptop) on a ride that was pretty far away (no I wasn't driving either) although that's probably something i've never tried while on a PC. ..

But that 350 I purchased certainly wasn't enough. I know my little dell i6000 works with less than a 100w inverter. The sager is a killer but that's what you get from running an FX60 chip with 7200RPM HD's on a 17" monitor and a UPS for a battery. .
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post #17 of 21
4/16/06 at 2:30pm
So to have the 9750 run in a ciggarette lighter you will need a 400w inverter?
Any other good links to where to get 1?
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post #18 of 21
4/17/06 at 5:38pm
you cannot run the 9750 on the cig. lighter. it will blow the actual lighter itself. don't even try it. you must use an inverter and run it directly to the car battery. a pure sinewave inverter is recomended over the modified sinewave versions.

if you read the link i provided, it will answer all your questions.

edit; you did not purchase a laptop. you purchased a portable desktop.
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post #19 of 21
4/17/06 at 6:06pm
Quote:
Originally Posted by Argh
you cannot run the 9750 on the cig. lighter. it will blow the actual lighter itself. don't even try it. you must use an inverter and run it directly to the car battery. a pure sinewave inverter is recomended over the modified sinewave versions.

if you read the link i provided, it will answer all your questions.

edit; you did not purchase a laptop. you purchased a portable desktop.
Thanks.
1 more reason to buy the M570U vs the D900K.
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post #20 of 21
4/17/06 at 8:14pm
NP9750 Power Supply is rated 20V 11A on output. That is 220W. Most power supplies have around 60% - 90% efficiency, lets assume 80%. That means it needs 275W on input. An inverter probably has also 80% efficiency, so it means that the inverter needs to pull 340W. The car electrical system works at 12V, so the inverter needs to pull 28A from the cigarette lighter outlet. If the outlet is rated 15A it is either going to blow the fuse or the outlet is going to meltdown.

In short:
You will need 350W or even better 400W inverter to be safe.
Your cigarette lighter outlet should be rated 30A or more. Otherwise connect the inverter straight to the battery.

You probably should upgrade the car battery for more capacity and the alternator/generator if possible. I would suggest trolling car audio forums and find out what people with crazy car audio systems do.
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