Toronto Lexus es300H

Smart charger is a great idea Steve. When I first parked it away, I was starting it every week and just let it run for about 5 mins just to get the fluids moving and the battery charged. However I did get lazy and didn't keep up for almost 9months. I am hoping the seals and gaskets didn't dry up. I have also not checked to see if my AC condenser unit is still functioning but this does give me hope that it could be just a simple battery re and re.

Thanks Nick. I hope it is as simple as just replacing a 12v battery. I hope this will resolve the issue.

Thanks Herbie. I will try that and see if the issue is at the 12V level and not the charging system.

Hello All, I am having issues with my 2015 ES300H. It was parked for some time during covid and I expected the battery to be down however I assumed a boost and some driving would juice it back up. When I boost it is starts and runs perfectly. The Hybrid battery also seems to run good. It runs on EV and holds charge, charges as well. I have no other issues at all with all features turned on and the car in park there is no significant drop in the voltage. My issue is as soon as I turn off the car I loose all battery power. It just dies as if the batter is fully dead. I don't know if it is the charging system since the power hold at fully loaded. The battery itself seems fine since it also runs good when running. Could there be another issue? Please help.