Electronic device that limits electro-magnetic emissions from multiple batteries

An electronic device comprising an earpiece speaker 154 and a plurality of batteries, with a first battery 102a positioned proximal to the earpiece speaker. At least one second battery 102b is positioned at a different location within the electronic device that is not proximal to the earpiece speaker. A controller 101 is electrically connected to a switch 104 that is electrically connected in-line with the first battery. The controller selectively toggles the switch between first and second switch states. The controller initiates activation of a first software mode of the electronic device corresponding to operation of the earpiece speaker. In response to detecting the activation, the controller toggles the switch to the first switch state in which the switch limits current drawn from the first battery while the electronic device is in the first software mode, thus reducing baseband electromagnetic emissions emanating from the first battery. The main embodiment of the invention is a flip or clamshell type mobile phone and enables better hearing aid compatibility for the device.