From 1st January 2026, Spanish regulations will require all vehicles to be equipped with V16 emergency warning lights as mandatory signalling devices for breakdowns or accidents. This new requirement will replace traditional warning triangles in Spanish vehicles, transforming how drivers alert others on the road.
Recent concerns have emerged regarding the safety of these beacons' batteries, sparked by a viral thread on X, suggesting potential explosion risks. The Spanish Civil Guard Association (AUGC) has voiced particular concerns about mandatory implementation potentially creating additional hazards for motorists in certain circumstances.
According to RTVE's Verification portal, all V16 warning lights must comply with Spain's General Vehicle Regulations, which mandate proper functioning within a temperature range of -10°C to 50°C. This specification covers most weather conditions typically encountered in Spain, though extreme situations - such as vehicles parked in direct sunlight during summer - could exceed these limits.
Technical requirements and safety standards
Dr Óscar Castillo, Director of Mechanical Engineering at Nebrija University, explained to RTVE that lithium battery short-circuit risks might increase in extreme temperatures, particularly with defective or aged devices. However, it's worth noting that not all V16 beacons use rechargeable batteries; many operate with conventional batteries, significantly reducing overheating risks.
Expert safety recommendations
CSIC researcher Félix López emphasises the importance of proper design and manufacturing standards to ensure battery safety. He advises against exposing vehicles - and consequently the beacons - to prolonged extreme temperatures. Regular maintenance and battery checks are crucial for optimal device performance and safety, following manufacturer-specified lifespans.