Cold temperatures increase the internal resistance, which decreases a battery’s capacity and slows its ability to accept charge current. For years, operators in cold climates have made it a practice to endure the inconvenience of removing batteries from aircraft, transporting and storing them in a heated environment, then reinstalling prior to departure. Some also use external heater blankets that wrap around the battery and heat the outermost cells when the aircraft is parked. Although this solution increases capacity, in some cases the battery cells are not equally heated resulting in diminished capacity and disproportionate recharge across battery cells.
To maximize battery performance, Concorde has developed heated batteries in its most popular sizes.