I have had a boat in registered in my name since 14. 56 as of the 30th. Never gotten more than 3 yars out of a house battery . Even the boat I purchased in 22 , all batteries dead in capacity were from 2018 , 4 YEAEAS old . I cycle too much power through them. Starting up to 10 years. Its how much power you cycle through a led acid. Its simple chemistry. the more power you cycle through the led the more degradation of the led. Resulting in battery failure.
Regardless of Weather or not you accept my documenting. Just look at spec of lead acid. 500 cycles at 50% .