I got a Platin type 110 off eBay £55 incl. delivery. To replace the original 18yo Varta and as it turned out - unnecessarily. Bad earth was the problem in my case. Now with the benefit of hindsight, I think this is how to check - when starting the car, watch the dashboard alternator symbol (picture of battery). If it dims during cranking but other dashboard lights stay bright, then it's not the battery. Probably the earth point behind n/s head lamp. If all the lights dim during cranking, then it could be the battery. But check also battery connections are good.
Anyway the Platin battery seems OK. Whether it will last as long as the Varta, maybe. It doesn't have to work very hard in my 1.4 petrol.