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(Common battery annotation)

Let's take a look at the composition of a laptop battery. Remove intelligent control circuits, laptop battery is actually a battery pack, usually 3-12 satellites batteries (that is independent of the lithium batteries), with their way through the series and parallel combined together to form a large-capacity high-voltage battery pack. Its adherence to principle is parallel to increase current series Sony VGP-BPS5 battery for higher voltages, which are involved in the junior high school physics knowledge.

(Different combinations of different types of batteries, their size, capacity, voltage is different)

With common 2200mAh, 3.6V batteries, for example, could have used some small way the composition of four batteries in series, their voltage is 14.4V, Capacity 2200mAh.

Many 14-inch notebook Sony VGP-BPS8 battery, you might use 2 and 4 strings of 8-cell hybrid mode, the voltage remains at 14.4V, capacity doubled to reach 4400mAh, to ensure a longer usage time.

However, the same is a 2200mAh, 3.6V batteries, if we adopt the 2 and 3 strings of 6 cores hybrid approach, its battery capacity it will still be 4400mAh, voltage down to 10.8V, if we just look at capacity, its use of time should be, and 8 the same cell battery. However, the 8-cell battery, after all, two more batteries, which are a waste it?

It should be noted, when we talk about computer power consumption, the total nominal power use, rather than a simple yes-current. Our battery power should be multiplied by current, voltage, such as the previously mentioned 8-cell lithium battery, the power should be 63.36Wh, 6 cores for 47.52Wh, 4 cores for 31.68Wh. If according to this value, 8-cell lithium battery Sony VGP-BPS9 battery advantage reflected. The vendors nominal standby time, is derived by the following formula: The battery power (WH) / Notebook standby power consumption (W) = Standby time (h). For example 63.36Wh 8-cell lithium battery with standby power consumption of 10W in the notebook, the resulting standby time is approximately 6 hours.

However, in theory, in reality, they are not that simple. We all know that any energy efficiency has a problem, the battery is no exception. High-voltage battery, its efficiency is relatively low, even if the same total power, its use of time than low-voltage high-current battery Sony VGP-BPS10 battery short, we now have introduced a number of vendors have begun high-volume low-voltage battery (more parallel, less in series) to ensure that Notebook longer standby time, while the battery is almost no increase in cost.

(Low-voltage, high-capacity batteries will be the development trends)

In short, both Wh or mAh, can not very intuitive manifestation of battery time, and most manufacturers like to mark mAh, and will not cause too much confusion. Only in the purchase, you need more comprehensive consideration of many factors. Knowledge and understanding of the above, here we take a look at how to buy the laptop battery Sony PCG-R505 battery bar!