A mobile phone that coordinates power management across multiple communication devices. The mobile phone comprises a processor, a memory, long-range and short-range radio transceivers, and an application. When executed by the processor, the application receives device power reserve and device application usage information via the short-range radio transceiver from a portable communication device, and transmits the device power reserve and device application usage information, a phone power reserve and a phone application usage information via the long-range radio transceiver to a server computer. The application further receives power management instructions via the long-range radio transceiver from the server, creates a device power management command based on the power management instructions, transmits the device power management command via the short-range radio transceiver to the portable communication device, and configures the mobile phone to manage a battery power reserve of the mobile phone based on the power management instructions.