I followed this advice from Grove Batteries in Cheltenham, and it has worked well:
We stock the Odyssey PC925 @ £153.44 inc VAT with a 2 year warranty.
The Red Top is the same battery but re-labeled, the Red Flash is a cheaper alternative using more conventional AGM technology.
The PC925 is a pure-lead battery-Top grade lead with few additives capable
of lasting many years if correctly maintained.
Have a look at the output of your charger. If under 3 AMPS then it may be delivering
too low an output to run built alarms/immobilizers/ trackers etc. In effect the
battery runs down, especially if the vehicle has low mileage.
I would suggest at least a 5 amp CTEK charger / maintainer (about £60.00)
