As the toyota is a hybrid, without an alternator, it isn't comparable with your skoda. But given that toyota wouldn't expect the battery to be 'flattened' I'm not surprised that the stop/start function isn't disabled (even though it probably should). As for the time it took to charge the battery, that is because a trickle charger, as its name implies, works very slowly.

Regarding the skoda, I'm very surprised that you need to give it a good run for the stop/start to work, surely that would only be the case if the battery was almost flat?. If that is the case, and you frequently leave the car unused for long periods of time, you really should be using a trickle charger on it too.

Problems with the 12V battery of hybrids are well-known - latest, see this long-term test of a Kia Niro in Autocar last week:

www.autocar.co.uk/car-news/our-cars/kia-niro-long-...s

This quote from a Toyota forum gives an explanation:

""...the 12V battery is a slight weakness in Toyota Hybrids. Since it doesn't have to start the car (the big HV battery does that), Toyota put a low capacity (and lighter) battery in. However, it does mean it's sensitive to leaving lights on, or sitting with ignition on but not 'READY'. (When in 'READY' state, the HV battery charges the 12V battery, even when the engine is not running). Also, when you open a door, the 12V battery runs an electric motor to pressurise the brakes, which drains it a bit more, as does the alarm and remote door lock sensors.

If you don't start a Hybrid for a few weeks, on a long holiday for example, (4-5 weeks on a Gen 1 or 2 Prius) the battery can flatten even if nothing is left on. If the battery is weak, it can flatten more quickly."