To be honest with you I don't think you have anything to worry about,I usually change my batteries on average every six years as by then they are past there best,the battery 🔋 in my Lexus IS250 was checked last year and was okay and passed the drop test,however as I only did a thousand miles between last year and this,went to start it about 6 weeks ago and it was a bit sluggish and the next time wouldn't start,so I had to use a jump pack to start it.Took it down my garage and had them test it and it came up bad and replace,so had it replaced,hope this helps 😊