Hi, new member here, located in UK. I have had my CX60 since September. Mainly short local journeys in EV mode. Warning has appeared on dash telling me that the 12v battery is low, and to start the engine. I have done about 40 miles on engine only, but warning still appears with annoying sound that continues for 30 seconds. I connected a battery charger, and left it overnight, for two nights running. Warning still appearing. Help!