Where is the car battery located?

[StIsaac]

The car battery is generally located in the engine compartment at the front of the vehicle, near the engine, or under the front passenger seat. In some models, it is installed under the spare tire in the trunk. The battery acts like a pacemaker for the car. During engine startup, it supplies power to the ignition system, fuel injection system, and other components. Additionally, it powers various electrical devices inside the vehicle, playing a role as crucial as the engine itself. When the battery charge is low, a warning light will appear on the dashboard, alerting the driver to replace the battery. Ignoring this warning may result in the car failing to start. In such cases, pressing the brake and lightly applying the accelerator while engaging the ignition button may help start the car. However, immediate replacement at a repair shop is necessary to avoid complete battery depletion, which would render the car inoperable. Daily maintenance for car batteries: Keep it clean: Maintain the battery in a clean and dry condition, ensuring ventilation holes are unobstructed. Clean any oxide buildup on the terminals and apply a small amount of grease to prevent corrosion. Charging voltage: Avoid overcharging or undercharging. For a 12V battery, the standard charging voltage should be between 13.5~14.5V, while for a 24V battery, it should be between 28~29.9V. Electrolyte level: The electrolyte should cover the plates. If the level is low, top it up with distilled water (not electrolyte). Rainwater or snowmelt can substitute for distilled water, but never use tap or river water. Regular charging: Batteries discharge over time when unused, leading to failure. Start the car periodically to recharge the battery. Avoid using electrical devices when the engine is off, as this drains the battery. Prolonged parking in open areas should be avoided; if unavoidable, remove the battery. Battery replacement cycle: New car warranties typically last three years or 100,000 km, and car batteries generally last about three years. Beyond this period, drivers should monitor battery health closely and replace it when necessary. Frequent use, high loads, or extended operation may shorten battery life. New car batteries often last 3-4 years, but replacements thereafter may only last around 2 years. Types of car batteries: Currently, car batteries are broadly categorized into two types: traditional lead-acid batteries and maintenance-free batteries, which have gained popularity in recent years. Lead-acid batteries consist of positive and negative plates, separators, a casing, electrolyte, and terminals. Discharge occurs through chemical reactions between the active materials on the plates in the electrolyte (dilute sulfuric acid). The grids are made of lead-antimony alloy. Over time, water loss occurs due to antimony contamination, leading to gas release and electrolyte depletion. Maintenance-free batteries use lead-calcium alloy grids, reducing water decomposition and evaporation during charging. Their sealed design minimizes acid gas release, offering advantages such as no fluid refills, reduced corrosion, better overcharge resistance, higher starting current, and longer charge retention, making them increasingly popular.