Power Adapter with the indicator light
AC plug that can be removed
Extensions to roll the power cord
MacBook Pro Charger
In this journal, I will talk about how usable the design of MacBook Pro charger is. The design of the charger meets the feedback principle. The charger has an indicator light in the power adapter plug. If this light does not turn on, this means that the plug is not connected correctly in the port. However, if the indicator light turns on, this means that the plug is connected correctly in the port. The indicator not only helpful in knowing if the plug is connected well or not, but it tells if the battery is full charged or not. If the light is amber, this means that the power is going to the battery. But if the indicator has a green light, this means that the battery is full charge. Furthermore, the power adapter plug can be inserted into the port in any way. I mean it does not have the problem as in the USB where you have to insert it in a specific way. The plug has a magnet where it can be easily insert it into the port. Even if there is no light in the room where you work on, you just need to make the plug near to the port and it will suck on it. Another feature that makes the design of the charger is usable is that the length of the cord is appropriate. It is not too long or not too short. In addition the AirPort Express has an AC plug that can be removed if it is not suitable tto the AC outlet. This feature makes the charger to be used with different AC outlets. Another nice feature in the charger is that it has two extensions on the sides of the AirPort Express that can be used to roll the cord around it in a nicely and organized way. All these features makes the apple charger usable.
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