I went to Australia for 7 weeks in May/ June. After advice from here , I made sure the 12 volt battery was fully charged via CTEK , and the vehicle stays outside all the time. On return , absolutely no problem, started immediately as expected.
I think unless the car is left in a discharged state and/or for long periods, it will rarely cause problems. The Jazz is designed to cope with short local journeys , which I do regularly, and have done with previous models , and never had a problem.
There will always be instances of premature battery failure, but I am sure they are extremely rare, and in no way are of concern to me, in the same way Hondas generally are pretty damm near perfect. I just drive and service on time and check the essentials…….that’s it.