When you are buying laptops or digital cameras, its original statement, the battery would normally be used for reference, this is how calculated? With machine power consumption (power consumption) and the battery capacity is very much related. To maintain a Taiwan notebook computer operations, many parts needed to complete the drive, such as: CPU computing, the hard drive motor rotation read data access, display the current situation…. etc. These have to rely on battery power supply to operate, and these component is the source of power, the overall increase in the total power consumption, which is the laptop's power consumption, the unit: Wh (kilowatt-hours), on behalf of the number of watts per hour consumption. "watts (W) "Power unit, the product of voltage and current (W = V * I), the voltage to maintain the operation of laptop basic working voltage, current operation depends on the situation, and there are different power consumption, such as open DVD and speakers high power consumption, low-standby power consumption, so the whole, the consumption machine is not fixed, but a low power consumption of high status.
Imagine a battery is filled with the electric kettle, if capacity of 5000 mAh, if mA per hour in 1000, the discharge rate will be released, about five hours on battery power End was released, the machine is 1000 mA power consumption, so when you laptop power consumption is 30 Wh, and your battery specifications 14.4 V, 3600mAh, your battery is about the use of time: 14.4 V * 3.6Ah / 30Wh = 1.728 hours. Therefore, when you buy one with the battery, Specifications for the 14.4 V, 4000mAh battery, the time available to about 1.92 hours
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