Buying a used battery can save you between compared to new units, but the "where" depends heavily on whether you need it for a car, laptop, or solar project. 1. Used Car and Vehicle Batteries
For automotive needs, reliability and "cold cranking amps" (CCA) are critical.
Used lithium batteries for electronics are often sold as "refurbished" or "open box."
: These are the most common local sources. You can typically find batteries for $20–$60 . Sites like Pull-A-Part offer tested and affordable inventory.