Not sure what you are saying, but a 4-5 year old battery is iffy at best. A 6 year old battery?... I'd ask for a new one even if it was kept on a charger. It's end-of-life. Fluids are cheap. Go for the high dollar stuff.

 

Batteries are like tires and helmets. It is a good idea to change them out every 5 yrs.

 

agreed