Well with an Exide I'n not sure on teh age Normal battery life on MOST batteries is 7-10 years. mine lasted 9 but likely should have been replaced earlier
The one thing I am sure of though is "That's not much battery"
A group 24 is about 70-75 Amp hours and if that is a MARINE/DEEP CYCLE you can only use about 14-15 of those. Not a lot of battery.
NOW if you have the room a pair of GC-2 (Golf car Flooded wet (usually) Batteires_) Each one has about the same foot print as your Group 24. but they are a bit taller... The two, in series (they are six volt so you need two in series) 220 amnp hours give or take a but and you can use half that's like 8 times the power for about 2x the cost. BIG improvement (They cost about the same as a Group 24)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times