Batteries on the LR4 don't usually last long. The original batteries on these weren't great and most people needed a new one at around 2.5 years. That was still within the warranty period, and most dealers replaced them with Interstate batteries. That's what was on mine when I bought mine at about the 3-year mark. I drove with that battery almost 2 years and 24,000 miles until it went bad and I replaced it with another Interstate. That battery lasted me about 3 years and 34,000 miles until I replaced it with an Odyssey. Now I regularly use a ctek on my battery and hope it will last longer.
This is all to say that, if that's your original or your second battery, it belongs in a museum. I can almost guarantee you that it's time for a new one. I joined this forum right when I bought my Rover and most on here at that time were still the original owners. I have never seen a "JLR"-branded battery posted here before.