Why would a discharged battery freeze in the winter?

A discharged battery can freeze in winter because it has a lower electrolyte concentration, which raises its freezing point. When a battery is fully charged, the electrolyte is more concentrated, making it less susceptible to freezing. A discharged battery has a higher water content relative to the acid, leading to a higher risk of freezing temperatures. Additionally, cold temperatures can further reduce the battery's ability to generate power, exacerbating the issue.