What does 45ah mean for a car battery?

[PenelopeLee]

Battery 45ah refers to the battery capacity of 45 ampere-hours, where 'a' represents current and 'h' represents hours. In simple terms, if the battery supplies a current of 45 amperes, it can only provide power for one hour. A car battery is a type of battery, also known as a storage battery, which works by converting chemical energy into electrical energy. The battery commonly referred to by car owners is a lead-acid battery, which mainly uses lead and its oxides as electrodes and sulfuric acid solution as the electrolyte. It is important to avoid storing the battery in a discharged state. When the battery is discharged, sulfation is likely to occur, where lead sulfate crystals adhere to the plates, blocking the ion channels and causing insufficient charging and reduced battery capacity. The longer the battery remains idle in a discharged state, the more severe the damage. When the battery is not in use, it should be charged once a month to extend its service life.