Abstract: The present invention provides an electronic device comprising a battery terminal (240) for coupling the electronic device (100) to a battery (280), a battery temperature terminal (242) for providing a battery temperature signal indicative of a temperature of the battery, a switch (210) selectively providing bi-directional coupling of a charging input (275) to the battery terminal (240), a power supply feed line ((B+)) coupling the charging input to at least one module (103, 102) of the electronic device (100), a diode (212, 220) providing continuous one way coupling from the battery terminal (240) to the power supply feed line ((B+)), a battery charging detector (235) having charging detect output (237), and a controller (230) having a control output (233) coupled to a control switch input (216) of the switch (210) and inputs coupled to both the battery temperature terminal (242) and the charging detect output (237), wherein in use the controller (230) open circuits the switch (210) in response to both recei