Hello, since I am currently working a lot with the ignition on the R8 I would be interested in a tip regarding a good battery support pot. Charging function is not interesting, at the most it can charge lithium batteries. It would be important that it could supply as much power as possible in order to compensate for the losses caused by the ignition and actuator diagnostics so that the battery does not suck out (think from 20A). Is there something that is also attractive in terms of price? or does it all move in the professional workshop area (priced)?