10 years old Die hard Gold

Best I can tell, the red top in my Duster is from the mid 2000's, so going on 15 years old. I've killed it a few times down to 3-4 volts when the brake lights stayed on, a super slow trickle charge has brought it back to life a few times. Now that i said something, I'll probably be in the market for a new one this spring. Lol