How Sub-Zero Chicagoland Weather Affects Car Battery Performance
How Sub-Zero Chicagoland Weather Affects Car Battery Performance: The Direct Answer When a northern Illinois polar vortex sweeps through DuPage County, car batteries face a brutal double-whammy. At 32°F, a standard lead-acid car battery loses roughly 20% of its available cranking power. When the temperature drops to 0°F, chemical reaction speeds inside the battery drop…