Hi guys, my 2014/2015 xc60 2.0T display 'battery low', I haven't used it much since last Christmas, about once a week (10-20km), and recently I saw 'battery low' message a couple of times, it's currently using a varta agm 70ah battery which has been used for almost one year, so my question is do I need to replace a new battery in this circumstance?

Many thanks!