Getting over Â£1,600
Join Date: Aug 2007
Location: United Kingdom
Re: Yep, another battery... maybe?
Since you've excluded your ICE as the problem, another thing worth checking before you splash out on a new battery is the internal boot lamp. Some of them have a mind of their own, could be causing a constant drain.
But, as the problem sounds to be getting worse you can probably conclude that your battery is deteriorating - they don't much like to be discharged/charged very often.
Your regular 'very short' journeys won't help either, the alternator charge of a short journey may not overcome the charge used to start the car for that journey.
If you do replace the battery, consider getting one with a higher amp/hour spec, providing it physically fits in the car of course.