Battery keeps dying

Question by mohammadsaud posted 2 days 15 hours ago in 2005-2011 (E90, E91, E92, E93)

I have a 4-year-old bosh battery that the previous owner got installed by a Euroshop. Two weeks ago the battery totally died on me. I took the battery to Advanced Auto, had them hook it up to a charger and battery condition reporter. It was showing my battery was at 165 CCA (rated 720CCA) . They kept the battery on the charger overnight and called me the next day and said the battery is fine it just needed to be charged. Two weeks pass by and the battery is dead, once again. I kept it on a trickle charger for 2-3 days after the battery was fully charged by advanced auto. Is it time for a new battery?