At what voltage can a car battery not start?

[DelJayce]

Car batteries cannot start when the voltage drops below 12V to 16V. The no-load voltage of a car battery is around 13 volts, while the load voltage should be greater than 11 volts, typically within the range of 12V to 16V. Before normal startup, the voltage should be above 13V; if it drops below 12V, the battery is considered undercharged. After starting, the voltage should be above 14V. The quality of a battery depends on its capacity, which can be measured with a capacity meter. Car batteries, also known as storage batteries, are a type of battery that works by converting chemical energy into electrical energy. Batteries are categorized into conventional lead-acid batteries, dry-charged batteries, and maintenance-free batteries. The commonly referred-to car battery is the lead-acid type, with a normal service life ranging from 1 to 8 years, depending largely on the vehicle's condition.