Anker's 36W 4-Port USB Wall Charger is the best multiport USB charger for most people. It's the most powerful charger that plugs directly into a wall outlet, letting you fast-charge up to three full-size iPads at once or four at a slower rate.What is a portable power outlet?
The Portable Power Outlet is a huge, heavy piece of hardware. It's not something you're going to toss into a backpack and lug around all day. It's the type of device you bring camping, tailgating, or some other power-starved place, and set it down. The battery is encased in rugged black plastic.What are the types of electrical plugs?
The three basic kinds of plugs are self-connecting, terminal-screw, and three-prong. Lamps and small appliances mostly use self-connecting plugs. The prongs clamp onto the wires of the cord, making an automatic connection.