I have a 2016 VW Golf 1.4 Bluemotion. It came fitted with a stop/start battery. Last Dec. this battery died completely on the motorway, and I had to have a replacement fitted, on the spot. It is a Renault Hi-Life 12v 70Ah. I have since read that a stop/start battery must be replaced with one of the same kind. I have been driving for nearly a year on the Renault replacement without problems. Is there any need to get worried?