How can I use an external display for a MacBook Air by keeping the lid of the laptop closed ?

Hi there,

First of all, I am new to the world of Mac and still in the process of learning from the fundamentals.

I bought a new MacBook Air last week and currently working on it by connecting to an external display via an Apple Multi port adapter.

When I do work, I usually close the lid of the display of the laptop. But to do so, I found in most of the forums that the laptop should be connected to the power. I feel it is not the ideal option because if I do so, I need to keep my laptop powered for long hours even though the battery is fully charged.

So my question is there any way in which I can use the external display without the need to connect the laptop to power ?

Thanks a lot.

BR,

Gayan.