Buy battery analyzer that way know the exact condition of any 12V battery.
Takes all guess work out of it and tell you condition of battery and if still good or bad.
Here one example
Batteries in Yamaha golf cart rarely last over 4 or 5 years. You can usually tell when losing amps, will be slower cranking and lights will be dimmer when trun key on most of them, but don’t take much to light led but can definitely tell difference when cranks.
Amazon.com