The car monitors lifetime cycling of the 12V batteries and gives a warning that battery need to be changed "soon". I happened to get this warning before going on the road trip and been advised by my SC that warning does not mean that failure 12V battery imminent, and it is safe to go on road trip, while making appointment with SC to replace battery within "couple of weeks or little more."
I successfully went on for a road trip and then replaced the battery about 2-3 weeks after appearance of the first warning.
My first battery replacement was at around 18 month. Now, 2 Years and one month later, I am still using the replacement battery with no problems so far.