The battery maintains power for starting, fuel injection, electronic management, and auxiliary lighting. Many engine failures are mistaken for mechanical problems when they actually stem from insufficient voltage. Repeated partial discharges accelerate sulfation. A battery older than three years should be evaluated for its charge retention at rest and its ability to recover after discharging. In lighting, aging reduces projected intensity before the bulb fails completely. Dim lighting increases perception distance and compromises nighttime safety. Checking lens alignment, cleanliness, and color temperature improves visibility without causing glare.
