cycles are typically around 1000 ish under heavy use.
if you use it every day, beating it and dont have an alt to support a majority of the system, it will act like your phone, i would think the life will be similiar.
but if you have a charging system and arent deeply discharging, the life should be pretty good.
who the fuck would put one of these in a stock 60amp OEM deal ?
you have a dollar to spend... shit.... ill go juggle banna's in the corner...
a car that cant fit a large alt? idk? a civic or what ever trying to set records. lol im just stating the facts