The Red Flash 750 is a 26 amp hour (capacity) AGM battery commanding an astronomical price for its size. It's also has an unusually low height of 125mm together with less common female thread terminals, likely to allow accomodation under the bonnet.
If you can source a similar size one of at least the same capacity (which may explain the modest longevity) at a reasonable price it may be the best course accepting, you may need to change battery connectors to more common type.
Hopefully someone with similar car has done the homework and can offer an alternate. Otherwise you may be stuck having to buy another Red Flash as
here.
