US Patent 11886273 Power source devices for power delivery contract selections

An example power source device includes a universal serial bus interface to couple to a power sink device, a power supply interface to couple to a power supply, a power measurement controller to measure a total power consumption of the power sink device and the power source device, a power contract manager to select a power delivery contract for the power sink device based on the total power consumption, a power supply rating of the power supply and a previous power delivery contract, and a power delivery controller to deliver power to the power sink device according to the selected power delivery contract.