mccldwll- No, in my opinion, if you don't have anything added in the way of electrical or electronics, if the battery is in good shape, it shouldn't go dead in a month. So many batteries these days are junk that it is hard to recommend a GOOD battery. Though the battery is only 2 years old, a lot of them are already getting weak by then. You just don't know it when you drive it every day. It doesn't take a lot of amperage to start a car that is in good shape- then it runs on the alternator. The battery is pretty much just for starting. When run every day you won't realize it is getting very weak, but setting a few days, much less a month will reveal the truly weak battery. If it's only 2 years old, is there a chance it is still under a full replacement warrantee? A lot of batteries now have a 3 year free replacement warrantee before they start pro-ration period.
Actually, we accidentally left a dome light on for a week while away on vacation, and that killed the 3 year old battery. Once recharged, it's continued to work fine, but there was ZERO juice in the battery when we got back.