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Adapter is how the heat generated
Regardless of any power supply has a certain internal resistance, so when the power supply output current when the pressure drop in internally generated, equal to the output current multiplied by the power supply internal resistance. Drop will result in two things, one is to produce heat, is equal to the square of the output current multiplied by resistance, so the power will be hot, and the other is the output voltage to the internal nominal voltage minus the voltage drop, causing the output voltage decreases.
The design is usually considered after the completion of heat dissipation, generally limits a current value, when the output current reaches this value, the output voltage is reduced to 95% of nominal voltage, or other ratio, the manufacturers of the product according to the different needs of the load can be set be higher or lower ratio, the current value is the nominal current.

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Such as the ThinkPad 16V AC Adapter 72W nominal current is 4.5A (16 × 4.5 = 72). If the load resistance is too low, causing the output current exceeds the nominal current, generally two things will happen, one is the individual components of the cooling capacity of the heat caused more than burn damage caused by power, and the other is the thermal design margin left, merely reflect the output voltage is further reduced, if reduced too much may cause the load not work correctly.

Under the premise of guaranteeing quality, and we naturally hope that the more light the better the power adapter, the above comparison, we see some Lenovo notebook adapter has been successfully "downsizing", not only reduces the number of the volume, and reduced weight 0.24 kg or so.
Acer's new notebook a high degree of recent attention, in addition to cost-effective, but thinner than the other books is one of the reasons the body, but with the adapters into the bag if so, their total weight does not light than other books . It appears that Acer may be able to consider redesigning the power adapter and check it out.
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I believe that many laptop users have this feeling: prolonged use of laptops, the hottest place is not body surface, or even near the outlet, but the laptop next to the power adapter, holding in your hand will always be hot feeling, it will make people very worried about a sudden explosion or burn out. AC adapter laptop keyboard lcd screen laptop battery

Notebook Adapter is a high-precision, high efficiency switching power supply, its role is to 220V of AC power into low voltage DC, working for the notebook to provide a stable electricity.

As the power adapters are designed with fully enclosed structure, the shell does not have cooling holes, and no internal fan to aid cooling, and thus the power adapter at work, the internal temperature is high. Especially in the hot summer, touching the surface can feel the hot, the internal temperature is even higher. Thus in the daily office, entertainment, make it proper care and maintenance.

To create a good environment cooling

In high temperature environments notebook, power adapter should be placed in direct sunlight and well ventilated place; not the power adapter on the notebook's heat near the outlet, it will not only heat from the power adapter does not out, but also absorb some heat.

In the hot summer, we can put the adapter side to increase the contact area of ​​the adapter and the air, allowing the adapter to better distribute the heat out. For better heat dissipation, we can pad between the adapter and the desktop into a narrow piece of metal or plastic pieces to increase the speed of air flow around the adapter to speed up the adapter heat distribution.

An exception should be promptly discontinued

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Work in the power adapter Loud noise or smoke, is often damaged or malfunction, should immediately stop using, the professional engineer by the repair before it can again put into use.

Reasonable charge

When the notebook computer battery is charging, it is best not to run major 3D games and other heavy work load that whole process, so that the output power due to the power adapter is not enough spare capacity caused by slow or rechargeable battery dissatisfaction overloading the power adapter and so on.

Different models of notebook power adapter can not be mixed

Different brands of laptop power adapter output voltage and current values ​​so there are some differences, and therefore can not be mixed. Otherwise, at worst cause the battery to charge less power, the screen flashes and other phenomena, will be re-burned laptop motherboard or other hardware. Different models of the same brand of notebook power adapter for use should also be careful, it is recommended to consult the laptop manufacturer after the operation.