Compare the plug shapes, voltage and frequency in Eswatini and Nicaragua, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Eswatini, you will need a travel adapter for Nicaragua. Eswatini uses Type C/Type M/Type N plugs, and Nicaragua uses Type A/Type B, so the pin shapes will not fit any wall socket. Voltages differ (230 V at home vs 120 V abroad), so check the label on each device. Most modern dual-voltage chargers handle the swing without a converter, but heating appliances usually do not. The mains frequency is also different (50 Hz vs 60 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
Eswatini (home)
Nicaragua (destination)
Electrical specifications in Nicaragua
More about plugs in Nicaragua
In Nicaragua, the standard power plug is Type A and Type B. The country runs on 120 volts at 60 Hz. That means wall sockets in Nicaragua can be one of 2 different shapes — Type A, Type B, and your plug needs to physically match the socket to fit.
Full Nicaragua plug guide