People often talk in years, I answered that way the first time.
But we full-time and we dry camp almost 99% of the time
10 years of occasional weekends
Is not the same as 5 years everyday
When these battery time threads come up I ask " How Many Charge Discharge Cycle's"
Our batteries had approx 2000 cycles on them when I replaced then
50 weekends of dry camping equal 50 cycles if you recharge at home,even ten years would only be 500 cycles
And if you are a full hookup camper then the battery only does any work when your are in motion going to or coming home