There's no real reason to disconnect your battery when recharging it as long as the ignition is off when you do it.

IF IT'S a manual it might be a case of getting the right balance of engine revs and clutch slip. If it's auto it might just be a case of applying the right amount of revs to keep the engine firing. As for the doors, lower the window slightly and the doors will close more easily. The Getz has a small cabin and closing the door compresses the air inside. Lowering the window allows the air to escape as you close the door.

The Hyundai would be my bet. They are popular with young drivers and dealers like to have them in their yards for that reason. The fact that it has a bigger engine will also give it more appeal when you come to sell it. The Daihatsu's 1.0-litre engine is a little small and that will hold it back. If, however, you were planning to keep the car longer, I would be tempted to go for the Daihatsu as they have greater reliability than the Hyundai. The Daihatsu seems to be the favoured final transport of older folk who want a reliable run in their last years.