Cars been a bit sluggish starting of late,stutters a bit on turnover,I do mostly short trips to work etc.Decided to take a look at battery,its in the boot so on normal oil,water,fluid checks you dont see it, negative terminal was all green furry corrosion,battery itself was over 12v though. Cleaned terminals and post and put on charge overnight,hope this sorts it but it is the original battery (2006) so if a new one is needed I had my moneys worth. As the saying goes "Out of sight,out of mind". Check those batteries guys cold mornings ahead!