Does a laptop charger need a voltage regulator?

Charger go true a lot of power voltage regulators and in the end is not powerful inought to power loptop without battery, same capasity neaded to help maintain stable curent.

Charger go true a lot of power voltage regulators and in the end is not powerful inought to power loptop without battery, same capasity neaded to help maintain stable curent.

Over charging could be the result of several things including:

Faulty Voltage Regulator
1. A car's battery will overcharge if the voltage regulator isn't working correctly. A voltage regulator is usually part of the alternator, and is used to keep a steady flow of voltage to the battery. If the voltage regulator is defective, it will send either too little or too much charge to the battery. If it sends too much, the car battery will overcharge. The voltage regulator is easily replaceable at an easily affordable price, sometimes for as little as twenty dollars, as of 2009.
Faulty Alternator
2. Sometimes the alternator itself can be at fault. The alternator is the device that converts the mechanical power of the engine into electrical power to charge the battery. When an alternator breaks, it usually stops creating electricity for the battery, which will then eventually die. However, if the wrong alternator is placed in the car, or if the alternator is running at the wrong pace, it will create too much energy for the car battery, causing it to overcharge. The alternator is another easily replaced part.
Incorrect Charger Use
3. If a battery charger is used to charge your battery outside of your car, improper use of the charger can result in overcharging. If a battery is placed on the charger too long, it can result in overcharging, and a significant decrease in your battery's lifespan and efficiency. This is why it is important to read about your specific battery and understand how long it needs to charge to be effective. Too much charge will lead to problems.
Faulty Battery Chargers
4. Sometimes chargers can be faulty. Their settings may be wired incorrectly, or the charges labeled incorrectly. As a result, your battery may be getting overcharged, even if you are carefully monitoring your charging. This is a problem that is hard to avoid, as manufacturing mistakes can happen anywhere, anytime without warning. It is a good idea to test your charger regularly to see if it is running correctly.
Heat
5. Extreme heat in the summer can also have an adverse effect on the car battery. If the battery has been previously overcharged, extreme heat can increase the problems caused by overcharging, and exacerbate any other problems with the battery. This problem can be hard to avoid if you live in a warm climate. The only real way to ensure safety against this problem is to avoid overcharge in the first place.

A) Look on the bottom of the notebook. Usually states the Voltage (V) and Amperage (A)

Should state > Input: 18.5V/3.5A
(18.5 Volts at 3.5 Amp's)

B) Look at the charger;

The AC adapter (Charger) will state;

Input: 100 ~ 240V/50 ~ 60Hz
Output: 18.5V - 3.5A

Should look similar to this,

http://www.buy.com/prod/65w-new-ac-power-adapter-charger-cord-for-hp-compaq-presario-c300-c500/q/sellerid/24353325/loc/101/213887466.html

You can download the drivers from the Compaq/HPWEB support/download page. Make sure you select your model laptop and the XP orVista Windows version of the drivers you require and install them. Click onthis link to download the drivers: -
www.compaq.com/country/cpq_support.html

You need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.

Check power adapter’s DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced.
If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

Re Laptops

The tolerance level is around 10% of the input voltage of the charger for a laptop
So check the rating plate of the charger.

If it says 19v and you have hit it with say 23v you should get away with it however if you hit it with 30v+ then there is a good chance that the voltage regulator circuit is fried

Re Mains Supply

If you are talking about static electricity hitting components then all bets are off as they can run into 1000's of volts.

If it was a lightening strike then again you can get some really big voltages down power and phone lines etc.

Normally Routers and Modems get crocked first.

What died !!

I don't know of a universal charger that you can use with these as the battery requires a certain amount of voltage and amps you can't get with a universal. When looking for a charger, I would look for one that offers an output of 19V and 3.5 a. There are alot of chinese versions on ebay that offer 18.5V, but I'm not sure if they are great for the batteries or not.

try rundown the battery 3 times if still not holding charge your battery is faulty you have to replace it.


regards



Richard