My Dell laptop has a power problem

My Dell laptop has a power problem.

The Dell Precision M20 Battery stops charging when I move the power cord on the DC adapter. When I start moving the cord left to right, the power LED light on the front goes on and off and the battery charge LED goes on and off too.

I removed the precision m20 battery and tested the laptop again. The laptop starts fine from the DC adapter when the battery is removed, but as soon as I start moving the power cord the laptop shuts off. It looks like the laptop looses power immediately.

If you have a problem like that, most likely it’s related either to the power adapter or the DC-IN power jack.

First of all, I tested the laptop power ac adapter with a multimeter. The power didn’t cut off no matter how badly I moved the cord. The power adapter output voltage was 15.45VDC all the time. That means there is nothing wrong with the power adapter and most likely there is a problem with with the power socket inside the laptop.

Now I’m going to test the power socket inside the laptop.

In order to access the power socket I had to disassemble the laptop and remove the top cover assembly with the display.

You can find disassembly instructions for many HP, Dell, IBM, Lenovo, Sony and Toshiba laptops in these service manuals and guides.

In the laptop I was fixing (Tecra M2) the power jack is attached to a DC-IN harness and this harness can be unplugged from the motherboard.

As you see, I removed the DC-IN harness from the motherboard, plugged in the power adapter and tested continuity with my multimeter as it shown on the picture.

When the power cord is still, the voltage output is 15.45VDC, the same as on the plug.

But as soon as I start wiggling the plug inside the jack, the power cuts off and voltage goes to 0. It means, the power harness is bad.

The problem was fixed after I replaced the defective DC-IN harness with a new one.

In some laptops the power socket (DC jack) is soldered to the motherboard.
If the battery stops charging when you wiggle the power plug inside the jack, either you have a bad power adapter (test it with a voltmeter) or the power jack is broken or loose.

You cannot simply unplug the jack and replace it with another one. You’ll have to unsolder the old jack and solder a new one back on the motherboard as I described in this post.

If the power jack is not broken but loose (not making good contact with the motherboard) you can resolder the old jack without replacing it with a new one.

If you want to buy a new one,you can see more information from http://www.udtek.com

Dell U4873 Battery Guide

Notebook batteries are common topic of discussion, and the vast majority of questions about them deal with prolonging their lives. There is a lot of information about Lithium Ion (hereafter Li-Ion) batteries to wade through. There are a lot of misconceptions floating around as well. This simple guide addresses the most common notebook battery questions and concerns.

Your notebook battery such as Dell U4873 Battery will deteriorate over time whether you use it or not. Although the Li-Ion industry does not publicize this fact, your battery’s clock began ticking the moment it was assembled. The elements inside your battery slowly react with each other, eventually rendering the battery unable to supply the required power to your notebook. In addition, your battery is rated to last between 300 and 800 charge/recharge cycles. It will gradually lose charge capacity rather than abruptly fail to power your notebook.
How long will the battery last?
The general consensus is that notebook batteries(u4873 battery) last one to three years. While you can slow the battery’s aging and loss of capacity, you cannot stop either decline. The temperature of the battery, combined with the amount and nature of its usage contribute significantly to your battery’s lifespan. You can ease the aging process with some care and maintenance.

Nature of Usage

Li-Ion batteries do not suffer from the memory-effect (requiring complete discharge before recharging to avoid loss of capacity) like older rechargeable batteries. Regular full discharge/recharge cycles result in an increased loss of capacity per cycle. A series of partial discharge cycles are better for Li-Ion batteries than a single full discharge. You should, however, calibrate your battery routinely.

Temperature

Lower temperatures slow down the self-discharge (loss of charge while disconnected) and aging process of the elements within your battery. Therefore it follows that higher temperatures shorten the life of your battery. Leaving your battery connected while on laptop ac power adapter causes the internal temperature of the battery to rise. Removing your battery and storing it in a cool, dry place will help to slow the aging process. Keeping your notebook in a hot environment is also detrimental to your battery.

Amount of Usage

The Lithium-Ion batteries used in notebooks are rated to handle between 300 and 800 charge/discharge cycles. Some of these cycles are used when you leave your battery connected to your notebook while on AC power. On AC power, the notebook will routinely “top-off” the battery when its charge reaches predetermined levels (i.e. 95%). Removing your laptop battery and storing it in a cool, dry place will help to preserve some of these cycles.

Tips to Maximise Dell Inspiron B130 Battery Life

Laptop batteries are designed specifically for different laptops brand as well as models. Today laptops are powered by lithium ion batteries. Lithium ion batteries are lighter, have a better power-to-weight ratio,have a longer usable life, can hold a charge longer, and do not have the memory effect to fail prematurely.

Lithium ion batteries(such as Dell Inspiron B130 Battery and dell precision m60 battery ) are also inexpensive to manufacture as compared to the earlier generation of nickel metal hydride batteries. The only shortcoming about lithium ion batteries is as they contain lithium salt dissolved in a highly flammable solvent, there are chances of overhead which can result in short-circuits or even blow up in flames.

It is a common fact that all laptop batteries have provision for limited time of power supply. A good bargain is to check the battery power while buying a notebook. Here is one instant tip to optimize the battery settings in accordance with the energy saving mode of your notebook. These settings will put the hard disk into sleep mode whenever the workload is less and it will reduce the notebook microprocessor performance in order to maximize its battery life.

From the system preferences mode of your laptop, select view menu, then choose energy saver option from view menu. Right click on show details option and choose battery power from the pop-up menu. Finally choose longest battery life from the energy settings pop-up menu.
Tips to optimise your notebook batteries are described in the following:
It is a good investment to add more memory to your laptop as it saves battery power by reducing Windows’ dependence on the virtual memory swap file on your hard disk.

It is better to keep your laptop on standby mode when not in use for certain amount of time. Standby mode ensures all current info is saved in RAM with minimum consumption of battery power.
Charge your laptop battery frequently with a battery charger or AC adapter. It is very important to clean your battery’s metal contacts every couple of months to make it dust free. You can use a cloth moistened with rubbing alcohol to clean your laptop battery.
Try to set the screen brightness of the LCD panel of your laptop to the lowest comfortable level as very bright screen tends to consume more power from your battery.

Similarly it is better to get rid of the outer peripherals such as printers or digital cameras as they can still draw power from your laptop battery even when they are not used.

Turn of the unused features and technologies of your laptopo which are not frequently usable. For example, it is better to eject the CD or DVD when you are not using them as the optical drive has the tendency of reading CD or DVD it finds very often and this process consume extra battery power.

To save power, it is good idea to turn off the AirPort, Wi-Fi, IR radios and Bluetooth option when it is not required to use. Virus scan should be set only during the time you are usually plugged in as full-disk virus check by the hard drive and CPU consumes additional power from battery.

Opt for the power console applet to customize the power profiles on your laptop. Do not worry in case your notebook does not have power console applet option for most of the operating systems (starting from windows 98) have Power Options utility in Control Panel.

Turning off or at least disabling the PC Cards, FireWire devices and USB when not in use also saves battery power. In fact, disabling modem, network cards and USB ports consumes less battery power even when they are on. These devices are easily disabled in device manager.
You can use power saver option of your operating system to adjust the CPU processing power. Optimum CPU processes consume additional battery power and hence should be avoided if not required. Stop the auto start applications on your laptop, so that your laptop`s CPU can be stopped from doing unnecessary work.

With the above mentioned handy tips, you can truly increase the battery performance of your laptop.

High quality and cheap laptop batteries from China

As we know China has become a place to watch for all things savvy.So many laptop batteries are made in china .such as HP laptop batteries.It easily qualifies as the country that is upfront in the manufacturing of all electrical devices of all kinds. Engineers in the country make a good percentage of the working population and this leads to the main economy driver and major exports being electronics. And their expertise is not limited to making of whole electronic devices but also replacement parts.

Dell Inspiron B130 Battery 6 cells 4400MAH

One of the maintenance parts that require replacing after extended use is the laptop batteries.Laptops being mobile computers feed on a lot of power and unless one of the main reasons for making a laptop is to provide extended use on the road, then battery life dwindles in an hour or two. With time the batteries wear out and they need to be replaced.

Manufacturers know this all too well and they usually tag high prices on HP laptop batteries and IBM laptop batteries since they know they are definitely going to get a market for them.

China is a technology hub and things like Dell or Acer laptop batteries retail for cheaper prices. These batteries can be sold in bulk or individually and needless to say, better prices are always scored when purchases are made in bulk. At this point another idea springs up. Why not sell cheap high quality replacement laptop batteries from China.

They say a business idea is only as successful and fruitful as you believe it to be. When you decide to sell u4873 battery there is the potential of making a good lumpsum in the end. Most people prefer laptops to desktop PC’s due to the mobility factor. And that means that there will always be a market for laptop replacement batteries now and in the future. A good percentage of people are unwilling to make the purchases from the manufacturer due to the high prices. It gets worse when the batteries are sold through a retailer since the price goes up another notch. All these people would be your potential customers and you would actually get to profit from the venture.

To guarantee the chances of you being successful, you need to make sure that you get the replacement laptop batteries from a reliable source. Despite the fact that you are buying cheap ones that does not mean that you should compromise on the quality that you go for. Quality really matters if you want to build a customer base. Go for referrals and read reviews of the best cheap high quality replacement laptop batteries wholesalers so you can choose and ultimately buy from the best.

The capacity of notebook batteries

Notebook batteries consist of individual cells,such as a 6-cell battery.
Is there any way to estimate the overall capacity of a notebook battery from the number of its cells? How much capacity does such a cell typically have?

When selecting a notebook battery,such as hp pavilion dv6000 battery HP/Compaq Pavilion DV6000 Battery 12-cells 8800MAH Description:
Cell Type: Li-ion, 12-cells
Voltage: 10.8V
Capacity: 8800MAH
UL certificated cells inside!

http://www.udtek.com/hpcompaq-pavilion-dv6000-battery-12cells-8800mah-p-20875.html

manufacturers will often list an amount of “cells,” where each cell has a certain capacity; thus a 9 cell has 50% more capacity than an equal model 6-cell battery. That is useful for comparing directly, but the story is more complex if you wanted to compare different batteries on different laptops. Batteries have a voltage rating (V) and milli-Amp hours (mAH), which, if multiplied together, give you milliwatt hours.

For example, a 14.8 V battery with 4460 mAH gives you 66,000 milliwatt hours (66 watt-hours). You can compare laptop batteries this way, but also keep in mind that different laptops have very different power requirements that vary based on the components and how well the operating system manages power consumption. Typically, bigger, heavier batteries will give you a higher watt-hour rating. A 6-cell battery may be the same form factor as a 9-cell, but the 6-cell will weigh less since there’s less chemical in it to hold onto that charge.

If you are a mobile warrior, you will want the most cells and/or most watt-hours you can get into your model so you can go 5 or 6 hours without a recharge. It is so painful to run out of power before you are ready. ” And here I suggest you a online-shop to buy good notebook batteries.My friends have bought from udtek.com .There are many computers hardwares on udtek.com. She thought it’s a good service , fast shipping shop,and high quality shop.May be it’s good idea for us to see what products we need .