thanks a lot for the advice.
Ok, I have found memory savers available online, but they all need to be connected to another battery with clamps… I do have a powerbank that I use for jumpstarting, but it delivers 15V, so this may be too high? I doubt I can fit the clamps on a 9V alkaline battery (I noticed in above link some memory savers come with that connection)
In regards to what would happen when the battery would be disconnected and the car would lose all power, since this is an older car of 2010, with a naturally aspirated V6 engine, not much settings can be lost? not like with the new cars where it’s all computer steered?
From the Service manual of my car I only worry about this one:
It’s part of the “Automatic temperature control”:
Gas Sensor Sensitivity Adjustment Function
it’s part of HEATER & AIR CONDITIONING CONTROL SYSTEM chapter:
According to customer’s sense of smell, gas sensor sensitivity can be changed
Adjustment: Less or More sensitive setting than normal setting (REC later than normal operation.)
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of the intake switch memory function may be cancelled.
Think I figured it out to some extend: the aircon can choose to recirculate the air - REC setting or to take in outside “Fresh” air - FRE, so this sensor will determine when it’s set to automatic when to open for outside air or when to recirculate. Since I’m in Bangkok I always have it on recirculate, and so far it never changed automatically (it was once reset when I lost all battery power after not driving for more than a month…)
but what gas are we talking about here?! this gas sensor is measuring what? CO2? TVOC?
(according to the manual other settings that would be lost are no biggie: temperature fine tuning, window auto-up (fix is easy) and driver seat assist (seat moving backwards to get out, which by the way all still work after I once had a completely dead battery)