Communications device having battery monitoring capabilities and performing pre-scheduled events

Methods and devices are provided for monitoring a battery to determine whether sufficient battery power remains to perform an event at a pre-scheduled time. A communications device (103) includes a processor (338) that receives instructions to perform the event at the pre-scheduled time, determines a first amount of time until the event is performed, detects an idle mode (S501) of the communications device (103), the idle mode consuming a minimum amount of power, calculates a second amount of time until the battery is depleted (S503), the second amount of time being calculated while the communications device (103) operates in the idle mode, determines whether the second amount of time is less than the first amount of time (S505), activates a first alert if the second amount of time is less than the first amount of time while remaining in the idle mode (S507), and performs an action prior to the pre-scheduled time while remaining in the idle mode (S511).