Do I need a power supply?

Some of our chargers need a power supply and some are optional. A quick way to determine if one of the chargers we offer here at MaxAmps requires a power supply is that it will have “DC” only in the product title. Chargers that do not require a power supply will have “AC/DC” in the product title. Some of our AC/DC chargers also have the option to power them with a power supply for higher wattage.  These will be designated with an “Add Power Supply” drop-down menu option.