2011年8月10日星期三

Battery Care for Notetbooks

Notebooks or netbooks are equipped with lithium-ion batteries (or Li-ion polymer cells) for mobile power supply. Due to the limited capacity of the typically included 3-cell DELL XPS M1330 battery, many users operate the device, whenever possible, on the power grid. In my books I give to the tip, when operating on battery power supply decoupling in order to achieve its optimum life.

But there are people who argue that this measure is "nonsense" is. So I've decided to publish this blog post for something "light on" to bring and explain the reasons for my optimization proposal.

Why grow old batteries?

Lithium-ion technology (also applies to Li-polymer battery)-based batteries are subject to cell aging. The manufacturers claim that Li-ion batteries to reach between 500-1000 charge cycles. Then the DELL XPS M1530 battery capacity has dropped so far is that a meaningful operation is no longer possible.

Behind it is the effect of cell aging. Specifically, it is a cell oxidation, losing in the electrodes of the cell's ability to store lithium-ion. As a result, the internal resistance and the capacitance of the cell decreases.

Optimal conditions for cell oxidation have high temperatures and charge states above escalation of 90 to 95 percent of the cell capacity

What can I do, what should I avoid?

To achieve the number of possible charging and also to ensure a long lifetime for the DELL Studio 1537 battery, any user can contribute a lot with a few small precautions. Lasch said it is important to avoid the above "optimal conditions for cell aging", if possible. Here are some tips on battery care:

* The battery should never be exposed to high temperatures (eg, netbook or battery on the back shelf of the car in the blazing sun, filing on a sunlit window sill or the heater). High temperatures accelerate the aging of cells.
* Make sure the Dell Inspiron 1720 battery operation of this netbook that this allows is always discharged before charging starts at the next grid. This means that the allowable number of loading operations will be extended to as long as possible.

The last point can significantly contribute to life extension. Who is constantly changing between battery and AC operation, provoking frequent part load operations.

When operating on AC power then it comes to two negative effects: one developed any more working on netbook heat, making the battery is exposed to elevated temperatures. Second, the operation causes the power supply, the electrical charging system checks the Dell Vostro 1520 battery charge status and those with partial discharge fully charging again. It is always "partial load operation" as a charge cycle. In addition, when charging the last 5 to 10 percent of the battery via a controller, the charging voltage. Although the batteries have an internal protection circuit that prevents an "overload" of the cells. But the aging of cells at high charging voltages falls away very quickly.

Optimally, it is therefore to ensure the battery that the cells are discharged as completely as possible. Then the HP Pavilion DV5 Battery is fully recharge via the charger. This allows the 1000 charge cycles and the battery life of 3 to 5 years to expand (depending on how often the full charge cycles performed).

Tip: So if you operate a netbook mainly to AC power, it is advisable to extend the battery for these periods and then in a cool place.

Caution: You have to keep in this case the "total discharge" the battery in the eye. Even a Dell Studio 1735 battery is discharged slowly withdrawn from storage. The cell voltage drops thereby continuously. The cell voltage falls below a critical value, one speaks of total discharge. When it comes to total discharge copper deposits on the electrodes, which can lead to short circuits. The manufacturers of these cells therefore provided with a protection circuit that separates the cells of the definitive external connections, once the cell voltage is decreased by self-discharge below a critical threshold.

In practice, it is advisable to recharge the battery every 20 days on the charger to a capacity of about 70 percent and then to bring the battery back to the cool storage location.

I would refer interested readers to two sites, which contain more detailed information.

Some contents from:http://laptopbatteriesinc.sweetcircles.com/

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