Sunday, 31 October 2010

How To Choose The Correct laptop Battery,laptop AC Adapter

Finding your laptop Brand & Model

Your owner's manual should have the brand and model on the front cover. If you don't have your owner's manual then almost every laptop has a manufacturer's label on the bottom of the computer. This label should have the brand and model number on it.

Once you have the Brand and model of your laptop, use the Search Wizard to select your Brand and Model. Once this is done it will display the compatible Battery and AC Adapter under the Product column.

Here are some models from the major brand laptops:
COMPAQ: Armada, Business Notebook, Evo, OmiBook, Pavillion, Presario
SONY: VAIO
Dell: Inspiron, Latitude, Precision, XPS
IBM: Thinkpad
TOSHIBA: Satellite, Satellite Pro, Dynabook, Portege, Qosmio, Tecra
APPLE: MacBook, iBook, PowerBook
ACER: Aspire, Travelmate, Extensa, Ferrari
HP: Pavilion, Armada, COMPAQ Presario

For Windows 98 - Vista Only

If all else fails, turn on your computer and follow these instructions: 1. Go to your desktop. 2. Click 'Start' on the bottom left of the screen. 3. Mouse over 'Programs' > 'Accessories' > 'System Tools' 4. Click on 'System Information'. 5. Your computer's manufacturer, model, etc. will be listed on the following page. Selecting the correct AC Adapter -

Before purchasing an AC Adapter you need to make sure make the AC Adapter will give you the correct voltage and suitable current output.

To find out the voltage & current, turn your laptop over and look for a label, sticker or writing which shows the voltage and current, it should look something like the examples below. The voltage figure will have a "V" after the number i.e 19V and the current will have a "A" or "mA". i.e 3.15A. You can also find these shown on your original AC adapter if you have it. The Voltage must be within 10% of your original AC Adapters Voltage. The Amps may be higher but they cannot by lower.
If you are purchasing a universal AC Adapter or Car Charger you will need to work out the Watts of your original AC Adapter and select the universal AC Adapter or Car Charger with the same Watts or next highest Wattage. You can work out the Wattage by multiplying the Voltage by the Amps i.e 20V X 3A = 60 Watts. There is no 60 Watt AC Adapter so you will need to select the next step up which is the 70 Watt AC Adapter.

PLEASE NOTE: If the wattage requirement for your laptop is lower than the 60W or 90W output of the adapter, it will not damage your laptop, your laptop will only take the amount of power it requires. I.E. If your laptop needs 45W, then either the 60W or 90W will work OK. If your laptop needs 80W then you will need the 90W one as the 75W one will not be powerful enough. If in doubt please email us on our contacts page.

Once you have selected you Brand and Model from the Laptop AC Adapters Search Wizard it will display the compatible AC Adapters under the product column. Once you have clicked on the battery you will be redirected to the page displaying alllt he information about the AC Adapter. Click on the photo of the AC Adapter to enlarge the image and view the tip dimensions to ensure they are similar to your original AC Adapters tip dimensions. Selecting the correct Battery -
Batteries have two main ratings on them: Volts and Amps. Because laptop batteries do not carry a very large amount of power when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Milliamps. One thousand Milliamperes equals 1 Ampere. When buying a battery, always go for the battery with the most Milliamperes (or mAh).

Once you have selected you Brand and Model from the Laptop Batteries Search Wizard it will display the compatible batteries under the product column. Once you have clicked on the battery you will be redirected to the page displaying alllt he informationa about the battery. Ensure the battery is the same shape as your original and most importantly the Voltage is within 10% of you original batteries specified Voltage.

from:http://www.gogo-power.co.uk/how-to-choose-the-correct-laptop-battery-laptop-ac-adapter.html


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Sunday, 24 October 2010

How to Test a Battery Charger

Whether you're unsure that your battery charger is working properly.Running a test on you battery charger is an easy process to solve this problem.

1.Plug in your charger to an electrical outlet. Remove any batteries you may have charging in the unit.

2.Turn on your voltmeter unit. Be sure there's power getting to the meter. Plug in the test probes into the voltmeter according to the meter's instructions. Set the selector switch to the highest level for DC Volt or whatever is recommended in the meter's instructions.

3.Take a battery or battery pack that's compatible to your battery charger. Make sure the battery has no corrosion and is not leaking fluid. Touch the positive end of the battery with the red probe. Take the black test probe and place it on the negative side of the battery.

4.Check the readout on the voltmeter and see where the pointer is indicating to. If it's on the left side, or negative side, switch the test probes. If it's on the right side, it will show that the battery is receiving some charge. Where it points to on the meter will determine how much charge it received.

5.Check the battery charger to see how much power it's giving off, if you continue to receive a negative reading from the batteries. A negative reading will indicate a bad battery charger, and you should replace it. If the charger has sufficient amount of power flowing through it, it's more than likely the batteries are bad and just won't hold a charge.

FROM:http://www.toppower.co.uk/How_to_Test_a_Battery_Charger.html


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Thursday, 21 October 2010

To Make Your Laptop Battery Last Longer

Laptops are the pinnacle of mobility computing. When you have power. Battery life in laptops slowly deteriorates over time, because of the way laptop batteries store and use power.

No matter if you buy your laptop online, off-line and no matter what sales person tells you otherwise. Even if you left the battery out of your laptop, you’ll notice a difference in usage times over a period of years, check Battery University for more information on battery storage.

But following a few simple tips can save your battery life. Note: This also works for phone batteries as well. Charge the battery early and often. Lithium-ion (Li-Ion) batteries will lose charge from age, but recharging it early and often makes sure that the charge is kept throughout the cells.

Don’t Frequently Discharge and Recharge the battery. This is called a “Deep Cycle” and should be only be done every 30 – 40 charges to re-calibrate the battery meters in the electronic device. Take out the Battery when using the laptop plugged in for an extended period of time. Batteries are more affected by heat than any other factor.

The heat produced by a laptop is designed to keep it away from the battery, but if you don’t need the battery in, it’s better to take it out and store it somewhere away form the heat produced by the laptop.

Preferably in the fridge or freezer*

*The battery should never be frozen. Although the freezing point of Li-ion batteries is around -40 degrees C, (way below what most conventional freezers), when storing the battery just make sure it’ll never reach those sort of extreme temperatures.

Never deplete the battery to below their minimum voltage (2.4 – 3.0V per cell)

With these few tips, you should be able to keep your laptop, no matter what brand, continually performing well. Tony Schirmer is the owner of the online Laptops and Computer retailer, that sells computer systems through to Comptuer Parts, tekfix.com.au. And has over 10 years of solid computer experience, including university education in mechatronic engineering.

from:http://toppower.co.uk/To_Make_Your_Laptop_Battery_Last_Longer.htm

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