I was recently asked IF it were possible to "store" lead/acid, ( wet cell) batteries...In my opinion, yes! I say that as long ago (when I was much younger) If that's even possible....I worked at a few "service" stations and truck stops...The batteries we had were on the shelves for who knows how long...all kept dry and not filled with sulphuric acid until needed. Now as I understand it, "today", when you buy a battery for the most part, it comes pre-filled and ready to go...sort of. I'd guess, they are NOT as up to par as they would be having been freshly filled...? Anyway, IF I had the inclination today, I'd buy whatever sizes and amount of wet cells I'd need, I'd take them home and CAREFULLY drain them... into say a plastic bucket, saving the acid for later *usage. I'd then rinse the plates off with a good amount of distilled water, leave the batteries inverted for a few days to dry out, then I'd re-cap and store them until I need them. *The acid would need to be put into either a dark ( brown) plastic or glass chemical jar or jug, then stored in a cool dry and dark place. Once the current batteries expire or no longer take and hold a charge, I'd simply refill the stored batteries with the separated acid ( or buy and keep some on hand for later use) and be back in business in no time... Your thoughts?