The phrase "power plug" refers to the device that connects an electrical device to an electrical outlet in order to provide it with power. Full definition
Just like the previous van hire models they come with power plugs to allow any customer to recharge their electrical appliances. (breakingtravelnews.com)
There is no universal power plug which can make it quite difficult to travel with a breast pump and other portable electronic devices. (pumpables.co)
The usual USB - to - AC power plug is missing. (marco.org)