Hi chaps, My 2012 A4 Avant (3.0 Quattro TDI), has displayed "weak battery" this morning. Granted, its been a week or so since I last drove it. During the nicer months it can often only be driven maybe once or twice a week on a long-ish run (family car), as the rest of the time I ride to work. Under the circumstances, should I wait until the battery finally gives up then buy a replacement, or is it worth buying some sort of trickle charger? The car won't fit in the garage though which could be a problem if I go down that route. After a quick search the best price I can get a replacement Exide battery is about £152. Any help appreciated.