Should I disengage the charger after the battery is full?

AOKSupCom wrote:

Should I disengage the charger after the battery is full?

No, there's no reason to. Your device will stop charging on its own when it reaches 100%.

You may also want to look at the following articles, paying particular attention to the sections on optimized battery charging:

Charge the MacBook Pro battery - Apple Support

Batteries - Maximizing Performance - Apple

I do that, but I only use the charger when I want to charge my MacBook to use it at meetings that are not at my home, at home I use an iMac.

You can also leave the charger plugged in and this will not damage your battery for as far as I know