Bring the battery home and keep it in a warm spot is the best thing you can do. Stored right it should hold a charge for a long time.

I have let past old cars I've owned sit from October to March or April and the battery still had enough juice to spin the engine over with plenty of speed. If you have batteries that need to be put on a charger several times a year you need to get a better brand of battery when those are used up.