Laptop ABC: A for battery

The big advantage of Laptos is the ability to easily take it anywhere with back and work there. This will only work if the battery is fit. The laptop site provides information and tips about laptop batteries.

In general, four types of batteries have been established: Nickel-cadmium (NiCad), nickel-metal hydride (NiMH), lithium-ion (Li-Ion) and Lithium Polymer (Li-Poly). The low cost and robust, but also heavy nickel-variants are found mostly in standard batteries (eg AA or AAA cells in digital cameras and remote controls). Lithium-donor power, as they are commonly used in laptops cost, while longer, but are lighter and can get by with less maintenance.

Lithium batteries

The downside: Lithium Technology holds by only 300 to 500 charge cycles and up to five times more expensive than the nickel equivalent. Everyone who has ever needed a replacement Dell Vostro 1510 battery for his laptop knows the problem – 100 € per battery, and more are not uncommon.

The life expectancy of a lithium battery is at room temperature for about three years – Whether it is needed or not. The reason: lithium electrode and electrolyte to eat slowly with time. This reduces the effective area of ??the electrode, increasing the internal resistance and high current load collapses the battery voltage. As a consequence, the unit switches off after a few minutes.

Eome tips for a long battery life:

Store unused lithium batteries properly

When a lithium DELL Inspiron 1300 battery for several weeks or months is not needed, it should be stored properly. Make sure before storing that he has loaded about half full – the charging light laptops should also show under load (eg when writing to disk) 40-50%. This will prevent that the battery is deeply discharged during the long storage. Then remove the battery from the laptop and put it at 15 to 18 ° C, eg in the basement. To ensure that the chemical processes take place between the electrolyte and electrode as slowly as possible. Before you put the battery back in operation, you load it in the device back to full.

Taken at continuous power battery operation

The Notebook is produced by the tight construction and inadequate ventilation lot of heat, which heats the DELL XPS M1530 battery up to 50 degrees. Heat accelerates the decomposition process and the battery sooner than expected to minutes of battery. At a storage temperature of 50 ° C. Lithium batteries lose after six months, about one-third of their capacity after one year and leaving just the left half. If you operate the notebook on the network longer, so take out the battery, so it stays cool, is not loaded and constantly lives up to twice as long.

Look for the expiration date:

After about three years, the capacity of a lithium battery can be felt after even with the best treatment. Unfortunately, very few manufacturers to write a production date on the battery – and if so, then coded. Because one does not know if a lithium DELL Studio 1537 battery is only a few weeks or two years old, an often feeble batteries are available. The risk may be lower for “fast moving” vendors such as Dell. In general (especially on eBay) is: Stay away from spare batteries, its manufacture date is unknown.

Battery life extended by firmware update

Your device turns off much earlier than in the technical data indicated the problem may continue a firmware update that prevents a premature shutdown. Almost all laptop manufacturers offer such updates on the Internet for download.

Battery in the laptop-ABC-ABC: The main battery terms

Capacity:
The battery’s capacity is measured in milli-ampere-hours (mAh). 4500 mAh, for example, mean that the HP Pavilion dv6000 Battery provides 4500 mA for an hour or three hours of 1500 mA. Then he is discharged and the voltage collapses under load. NiMH batteries the standard “AA” size, which is usually used in cordless phones and Digitakameras reach, currently has a capacity of about 2500 mAh. Bring good lithium-ion batteries in laptops are more than 6,000 mAh.

Some manufacturers give for Li-ion battery, the stored energy in watt hours (Wh) at. This unit, but you can easily convert to mAh: If, for example, the dispenser 10 Wh electricity and 7.2 volts, then divide these two values ??(10 Wh / 7.2V) – the battery therefore has a capacity of about 1400 mAh .

Unfortunately, laptop batteries are not standardized as NiMH cells (AAA, AA, etc.), but there are a variety of laptop batteries. Therefore you should consider before buying a laptop replacement batteries necessarily whether it really fits well with the laptop.

Battery Laderate:
This term is used regardless of the size of the loading or discharging of the battery capacity indicated. For example, a 1000 mAh battery with the charging rate of 3 C is loaded, is three times the charge current 1000 mA, or 3 amps.

Impedance or internal resistance:
The lower the internal resistance, the better the current flows. Increases the internal resistance in lithium Dell Inspiron 6000 battery due to aging or (especially for nickel batteries) by incorrect charging, then turn the powered device even after a few minutes of running again. With about 100 milli-ohms NiCd cells have the lowest internal resistance, followed by Li-Ion (150 milli-ohms) and Li-polymer battery (200 milli-ohms). NiMH cells have more than 200 milli-ohms to the highest internal resistance, which may increase with improper maintenance on over 350 milli-ohms.

Memory and lazy battery effect:
Nickel batteries are acidic when they are not required – then beats with NiCd batteries and the memory of the NiMH cells of lazy battery effect. Both effects are created by repeatedly charging with a too low current (for example, the charging rate of 0.1 C) or if you forget to unload batteries from time to time entirely.

It is this form of small crystals on the electrodes. The result: The operating time is reduced by up to 90 percent, because the internal resistance increases and thus breaks the tension when loaded. Except for one difference, both effects are similar: the lazy battery effect will not occur as abruptly as the memory effect. Modern lithium batteries do not know the memory effect, but suffer among other weaknesses, particularly the limited life time.