My understanding is that most Hybrids have a problem if left unused for too long because the 12v batteries are normally relatively small and modern cars have quite a lot of computer activity running constantly. A few hybrids can utilise a few battery cells in their large HV battery.
It doesnt need enough amps to actually start the car, and you might think that it wont need much to actually fire up the computer systems. But I read somewhere that part of the start up procedure involves the computer running checks before approving the start up (not much power needed) but then it needs to 'throw' quite a hefty solenoid switch to connect the HV battery.( Some cars have two such switches, I believe the Jazz only has one.) IIRC this switching requires about 30 amps. This is no where near as much as conventional car starter motor, but it does preclude just having a tiny 12volt battery for the computer systems alone.
I have gone quite a bit longer than 2 weeks unused without topping up the 12 volt battery, without problem , but maybe I am pushing my luck. I can probably manage at home, and can charge it, but what happens if its left for an extended period in an airport car park etc.
I am debating whether to buy one of these 'power bank' portable starters, that are small enough to keep in the car (only about the size of a paper back book). They claim to be able to start a conventional car so should easily manage the 12v hybrid start up procedure. But they do seem more expensive than they were a year ago.- even allowing for recent inflation. One of those things that I may never use and resent the cost, but invaluable should you need it. It would be great being independent of the need to call a breakdown service, , or trying to cadge a jump start from another car - or being able to offer help to others without endangering your own car.