Greetings, I ask because I have a 2 weeks long trip away from my Clarity and knowing that the small 12 volts battery is a lead acid battery (meaning 3% discharge per day). I calculate almost about 42% discharge in 14 days. I left the car connected to the EVSE (120 volts one) and hoped for the best. I heard it being said once that the 12 volts battery gets only charged when the car is ON. Also I have had bad experience in the past with draining the 12 Volts battery while setting up the Android Auto software, in instrument mode not ON mode. The instrument panel and side screen ended up shutting down and when I tried to put car ON I got the multiple warnings that most people get. When I checked my small 12 volts battery it was at around 8 volts. So my question is: when/how ofter does the small 12 volts battery get charged? and do I need to hook up a trickle charger to it when I am gone on long trips?