Top price-performance ratio. Have a P Cayenne with 2 batteries (12V 110Ah 520A AND 480A 12V 85Ah). My Board voltage was 11.1V. After charging overnight (14h) I had a board voltage of 12,4V. You can tell already when starting that pervades the starter better. Oh, I can only recommend that travels much short-haul. Especially before the cold season this charger is feeding the batteries again really. The handling is very simple, almost i-safe. The instruction manual is as simple as a short. Have the 4 pages read in a few minutes and also understood. This device is well worth ssein money. There may be güsntigere Chargers, their function and reliability I do not want to evaluate in more detail here.