Abstract: A merchant payment system designed for a high-traffic merchant. In an embodiment, the merchant payment system comprises a casing, a mobile computing device, a charging regulator, a payment receiver, and a docking station configured to charge the mobile computing device and payment receiver. The outer casing is configured to house the mobile computing device, a charging regulator, and payment receiver. Additionally, the docking station is configured to charge various mobile computing devices (e.g., a tablet or a mobile phone) housed within the casing. Moreover, the docking station is configured to supply a predetermined voltage and current to the charging regulator which in-turn supplies a first predetermined voltage and current to the payment receiver and a second predetermined voltage and current to the mobile computing device.