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Power supply what is the power supply wattage?

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Voltage and current can be found on ur battery
watts=volts +amps

Posted on Jan 29, 2009

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Energy management

More than likely your power supply is not the correct one for your laptop--meaning it may be of too low wattage. If the power supply has worked with this laptop properly before, the battery on the laptop needs to be replaced.

Nov 22, 2013 | Dell Inspiron Computers & Internet


What Watt Power Supply?

If you need to know what wattage power supply you need for your device and the label has Volts and Amps, use this formula to figure it out.

Multiply the Volts times the Amps and this will equal the Watts.

The label on the device should list these numbers.

on Mar 24, 2010 | Computers & Internet

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How can I find out how many watts my System Model DA238A-ABA 6450NX NA910 use in 1 hour? (compaq prisario)

Compaq Presario 6450NX Desktop PC?

Power Supply - 200 Watts

That is the supposed Maximum Wattage the computer will use per hour.

Variables come in to play, however;

1) Back when the computer was made, the Power Supply manufacturers were 'fudging' the real maximum rated Wattage.

True ratings were more like 60 to 70 percent, of what was actually stated.

Divide 200 by ten; take it times;
6 for 60 percent. 120 Watts
7 for 70 percent. 140 Watts

So, the Actual Maximum Rate Wattage, could be as little as 120 Watts, or a little more than a 100 Watt light bulb.

2) Second variable is what is the computer being used for?
Surfing the internet? About 100 Watts.

Playing an intensive game, (Yeah right. Not on that computer), or using an intensive program?
Then, you may be using the Maximum rated Wattage,
120 to 140 Watts.

So,........the hourly wattage rating, could be as low as 100 Watts per hour, or perhaps up to 120 to 140 watts per hour.

Also include the power used by the monitor.
If you do not have the specifications of the monitor, see if you can look them up online.

My HP 2009M uses 47 Watts, (2 Watts when in Sleep Mode),

My other monitor I use (Dual monitors), is an RCA 26 inch HDTV,
(RCA L26HD31)

Uses 82 Watts,

(And the power supply for my computer is 500 Watts.
Hmmm, wonder the little wheel spins so fast in my electric meter! lol!)

Add the two together to get a basic conclusion, of what Wattage per Hour your computer system is using.
Don't forget to include printer/scanner/fax machine/copier, WHEN being used.

For additional questions please post in a Comment.


Mar 04, 2013 | Computers & Internet

1 Answer

My Toshiba satellite pro L300 laptop restarts when connected to power or if not gives a blank orange, black or blue screen. It functions well on battery alone or when on power supply only in safemode will...

Are you using the original power supply that came with the laptop or have you had to replace it? If you replaced it, did you replace it with one that meets the OEM Specifications? Or did you replace it with one that has the removable tip designed to find a tip that will work on any laptop? The one size fits all with the removable tips will do damage to your board. Think about it, your laptop requires a certain amount of wattage. The wattage can't be too high or too low. The one size fits all can change the tip to make it go into the laptop, but the wattage can't be changed.

I think you system is definitely having a problem with the power cord.

Apr 03, 2012 | Toshiba Computers & Internet

1 Answer

Computer will not turn on

almost always the power supply-look on the back by the top of the housing and see if there is a green light near the on/off switch-if so your power supply has died, they are not difficult to replace and in most cases you can get a better (more wattage) for less than $50 on line.

Oct 02, 2011 | Acer Gateway NV5905h Notebook

1 Answer

I need a new ac power cord for my laptop that's a 65 watt does the replacement need to be the same wattage?

The replacement power cord needs to be the same wattage or lower. Lower will either take longer to charge the battery or won't charge it at all. But if you get a cord that has too much power it could fry your power supply.

May 03, 2011 | Computers & Internet

1 Answer

My a.c. Power supply plug at the computer broke. Can I get another power supply?

Yes you can, just make sure that the switch mode power supply you purchase has the same wattage or greater wattage that your old switch mode power supply.

May 14, 2010 | Computers & Internet

1 Answer

My computer says it doesn't recognize the wattage for the power supply, and won't charge when I plug it in, but I'm using the same outlet I've always used.

Is this a Dell by chance?

I had a similar issue. It turned out that my power supply was bad and I had to get a new one.

Mar 01, 2010 | Dell Inspiron 1526 Notebook

1 Answer

Dead Sony Laptop

If power supply is supplying correct voltage, then you do not need power supply PCB.

Try starting the laptop with AC adapter and no battery, if battery is shorting out you may get same problem.

Test the soldering joint on the AC socket and laptop motherboard, if there is a bad soldering on laprop ac adapter socket, you get same symptoms.

If it is none of the above, and the adapter is fine, then it is usually a faulty motherboard.

Nov 16, 2008 | Sony VAIO PCG-V505CP Notebook

1 Answer

Ac adapter

My first thought is "yes" as long as it says Toshiba on it, but if you have one that fits, check for the same wattage, and amps. The whole thing could go up in smoke even if the adapter has the right voltage - if the amps supplied by the adapter are too high.


Aug 18, 2008 | Computers & Internet

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