not being an ass but if your 454 cant idle you have other issues with cooling. check your timing.. . my neighbors 632 idles all day . trrust me. it .. just ... idleeesssss... allll dddaaayyyyy..
but truly, long playtime 'sucks" 'the life out of a batt and the more you do it , the less it is replenished. it dosent matter what brand or size they are, they will kill themselves by being discharged all the time.. now what do you consider 'all the time' is up too you. like once a month? or once a day . it makes a difference