Indoor storage is preferable to outdoor storage to avoid contact with water and to avoid extreme temperatures that can cause cracking. Rain, snow, and draining water should not enter storage area. Store used batteries on a non-reactive, impermeable and curbed surface. Coat asphalt or concrete storage surfaces with an acid-resistant epoxy, fiberglass, or plastic coating. Check it regularly for cracks or tears.
Some communities use large polyethylene fish totes without drains to store used lead-acid batteries.
To avoid releases of lead contaminated acid, make sure that there are no floor drains which lead outdoors or which connect to sewer systems, storm drains, or septic tanks. Avoid stockpiling spend lead-acid batteries. Store batteries upright to protect against acid leaks through vent holes. Inspect batteries weekly for cracks or leaks. Keep a log of your inspections.