Where a communications device maintains multiple wireless connections to other devices and networks which use slotted communications protocols, the slots used by those protocols are arranged so as to minimise the power consumed by the device. Where multiple radios are used, power is minimised by avoiding using radios at the same time when those radios are likely to interfere with each other. Slots used by communication protocols can also be selected to maximise the time that the communications device can spend in lower power mode.