New battery time. Sounds like the bad one has a shorted cell.
One thing that caught my attention is you had to add distilled. This should have been done LAST YEAR before sroring then charge and EQULIZE if it's done as part of your pre-store. .If done like a month before storage and bouncing down the road just Charge. Then disconnect when you store.
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