My GSF 063 battery has died. Mind you it did drain after the golf sat idle for 8 months. But it will no longer accept a charge after 4 months of use and going flat twice.
Phoned GSF yesterday and they wanted £38 + Vat for an 085.
Instead I bought an 085 from advanced battery supplies - the one that Khare found and offers a 5%

discount for forum members.
£48 & free delivery + 4 yr warranty.