Why does the battery light come on when driving through water?

[EllaMarie]

This light is the battery charging indicator, which may illuminate due to a temporary short circuit in the generator caused by water exposure while driving through flooded roads, resulting in a lack of power generation. Below is relevant information about automotive batteries: 1. Introduction: A car battery, also known as a storage battery, is primarily made of lead and its oxides, with sulfuric acid solution as the electrolyte. Its working principle involves converting chemical energy into electrical energy. 2. Classification: There are three types: conventional batteries, dry-charged batteries, and maintenance-free batteries. Conventional batteries have plates composed of lead and lead oxides, with an electrolyte of sulfuric acid solution. Dry-charged batteries are characterized by their negative plates' high electricity storage capacity, allowing them to retain charge for up to two years in a completely dry state. To use, simply add the electrolyte and wait 20-30 minutes. Maintenance-free batteries, due to their structural advantages, consume very little electrolyte and generally do not require distilled water replenishment during their service life.