Can I Bring Phone Chargers On A Plane. What you cant do is pack a lithium-ion battery that is not installed in a device in checked luggage. Portable chargers or power banks containing a lithium ion battery must be packed in carry-on bags.

Mobile phones tablets laptopsStand-alone power banks are considered spare or loose lithium-ion batteries and must be transported in carry-on baggage only. 1 FAA and TSA regulations regarding portable chargers. Larger snow globes must be packed in checked baggage.
Complete guide to cabin luggage.
Southwest Power banks also known as portable chargers or external battery chargers are lithium-ion battery packs used to charge other electronic devices eg. The kind you plug into an electricity supply to charge a phone or a different type of device and the type that contains a battery or power back that charges the device directly. For now phone use is only allowed if you put your mobile phones and other gadgets with a cellular connection on airplane mode. You can take plug-in cell phone chargers in carry-on luggage without restrictions.

