Will Forgetting to Lock the Car Drain the Battery?

[VanAriel]

Leaving the car doors unlocked can cause battery drain, but the amount is minimal. Here is some relevant information about car batteries: 1. Battery: Also known as a storage battery, it is a device that converts chemical energy into electrical energy. Car batteries typically refer to lead-acid batteries, which are mainly made of lead and its oxides, with sulfuric acid solution as the electrolyte. The normal service life of a car battery ranges from 1 to 8 years, largely depending on the vehicle's usage. 2. Battery Replacement: If the battery is dead, it is recommended to first measure the battery voltage. When using a multimeter, measure the battery voltage while starting the engine. You can initially use a high-frequency discharge machine or battery tester for measurement. Under a load current of no less than 110 amps, the minimum voltage should not be lower than 9.6 volts and should remain stable for 5 seconds. If the voltage is below 9.6 volts but remains stable for 5 seconds, it indicates over-discharge, and the battery should be recharged promptly. If the voltage is below 9.6 volts and cannot remain stable for 5 seconds, rapidly dropping to 0 volts or close to 0 volts, it suggests a possible battery fault that may require replacement.