Embodiments of the invention relates generally to electrical and electronic hardware, computer software, wired and wireless network communications, and computing devices, and more specifically to structures and techniques for managing power generation, power consumption, and other power-related functions in a data-capable strapband. Embodiments relate to a wearable band including sensors, a controller coupled to the sensors, an energy storage device, a power port configured to receive power and control signals, and a power manager. The power manager includes at least a transitory power manager configured to control an application of power to one or more components of the wearable band in one or more power modes. The band can be configured as a wearable communications device and sensor platform.