The phrase "charger port" refers to the opening or connection on a device where you plug in a charger to recharge the battery.
Sentences with «charger port»
A micro USB charger port sits on the bottom edge. (pcmag.com)
I love that they have back seat charger ports for charging tablets and game systems. (autolist.com)
The center console in the front has an additional car charger port, so both driver and passenger can charge their phones at the same time. (autolist.com)