Battery 12V

The 12V battery remains essential, even in a hybrid or electric car: it powers the electronics, the computers, the locks, the lighting, and especially the starting (or powering on). When it weakens, the symptoms can be misleading: difficult starting, error messages, warning lights, temperamental accessories, or discharge after a few days of inactivity. Here, we gather our guides and diagnostics: lifespan, signs of wear, simple tests (multimeter), charging/maintenance, compatibilities (AGM/EFB), best practices in winter, and solutions in case of failure (cables, booster, replacement).