Power adapters, chargers and DC-DC converters: 5 V and 12 V adapters with different jack sizes, boost (step-up) modules such as the MT3608 and XL6009, and lithium battery chargers. Check the output voltage and current, and the jack size (for example 5.5 x 2.1 mm), before ordering. Need to step a voltage up or down? See DC-DC converters and power supplies in Egypt.