system
Given the following post, respond as if you're commenting on Reddit:
human
Do batteries in a device which remains idle degrade faster than batteries not in a device?

If so, why?
gpt
This depends on like... a thousand factors. But generally speaking, power leaves the battery when there is a load on the circuit. And a LOT of devices(I dare say far too many) have a draw when there is no activity at all, a Standby power of sorts. Your car for instance is probably absolutely ripping with it. And even if your car happens to be a bit on the old side, no special computers or dash nonsense or whatever else, it can still provide a load, which will cause the battery to slowly drain. Which is a huge reason why you want to disconnect your battery on your car if you plan to leave it in the garage for a while. Of course, mess with thermals, or general battery treatment, or even storage methods, or whatever else, and you can end up shortening your battery's life significantly anyway, whether it's a car, a rechargeable, or a semi-disposable alkaline.   


TL:DR: Battery connected = Circuit = Load. Battery not connected = no circuit = no load. In theory.