A wireless communications terminal includes a radio communications component, a non-radio communications component, a battery, and a power controller. The radio communications component is configured to transmit/receive RF signals through a wireless air interface to carry out radio communications functionality with a separate wireless communications device. The non-radio communications component is configured to carry out non-radio communications functionality. The power controller is configured to supply power from the battery to the non-radio communications component while selectively preventing power from flowing to a least a portion of the radio communications component in response to a remaining power level in the battery being below a threshold reserve power level.