Skoda superb elegance 2.0 TDi DSG   My battery went flat around 12 months ago, it was old so I got a new one, before i did i checked what the alternator was producing and it was very low, but once revved over 1500rpm it kicked into full charge. If i remember correctly, it only had to go above 1500 once and the alternator kicked in and continued to even when idling at 900.   I told a garage about this in an MOT and they still left lights on and flattened my new battery. I mana