hi guys I got a Audi TT apx mk1 and just brought it from a mate and seem to have a very strange problem I turn the car on first turn it won’t start the engine then second turn it starts then wile driving the battery light comes up and basically starts dying brings up all the lights on th dash and headlights stop working but still runs then you can turn it off but when you try turn it on it won’t start like the battery is dead and then leave it for about an hour and it will start like it has a full battery I’ve just put a new battery in it and I have no clue what the problem is can anyone please help 🤔🤔🤔🤔