Check Facebook Marketplace, Craigslist, or Nextdoor for "parting out" posts or people cleaning out garages. Many will give them away just to have them hauled off.
Many "dead" batteries are just heavily sulfated. Using a smart charger with a "repair" or "desulfation" mode can sometimes bring them back to 80-90% health. buy and sell car batteries
Whether you are looking to clear out your garage or start a side hustle, the market for car batteries is surprisingly robust. Because they contain valuable lead and hazardous acid, they are never "junk"—they are either a core component for recycling or a refurbishable asset. 1. Buying: Finding the "Hidden" Inventory Using a smart charger with a "repair" or
Keep them upright. A leaking battery will ruin your vehicle’s upholstery or corrode metal floors. People on a budget
People on a budget, DIYers, or those with "beater" cars.
Some states have limits on how many "hazardous waste" items you can transport without a permit. Check your local EPA guidelines if you plan to move dozens at a time.