Battery longevity is MEASURED by the number of charge/discharge cycles they go through. Of course BETTER batteries will withstand many MORE cycles than cheaper batteries but in BOTH cases their life will be dependent on the number of cycles even when they are different numbers. IN other words, keep them fully charged as much as possible and avoid very DEEP discharges whenever possible. When you are dry camping it is better to charge battery bank each day than to go two or three days before charging.
Good luck / Skip