Trying to identify a connector for a multi-USB charger
That is a C7 connector.



Figure 1. C7 connector. Source: Wikipedia IEC 60320.

Commonly known as a figure-8 or shotgun connector due to the shape of its cross-section. This coupler is often used for small cassette recorders, battery/mains operated radios, battery chargers, some full size audio-visual equipment, laptop computer power supplies, video game consoles, and similar double-insulated appliances.