I have a die hard that I bought 4 years ago. Used it in a jeep then in a wood hauler not getting much use for over 2 years. Then my fathers battery went out so he used it for over a year without a issue, then a family members battery went out so he used it for a few months.
I bought that family members car in this past July drove it down and parked it for 4 weeks not disconnecting it. Came back the 8th and it fired right up without issue(no drains
). I drove it for 3 days then parked it and I don't see a issue with it starting after sitting another month.
When it does go out I will gladly buy another die hard.
You get what you pay for. Spend a little extra now and don't worry about it later.
Having good connections is just as important then the components they connect. Always look at the cheap things before pointing at battery.