How Long Should the Manufacturing Date of a New Battery Be?
2 Answers
Different quality batteries have different shelf lives. High-end batteries can last up to 5 years, while low-end ones vary, typically lasting from a few months to a little over a year. It cannot be generalized. According to relevant regulations in China, the warranty period for car batteries is one year or 20,000 kilometers. Therefore, it is advisable not to purchase batteries that have been in stock for over a year, as you will not be eligible for free after-sales warranty services from the battery manufacturer if the battery fails after the warranty period. Below are some tips for car battery maintenance: Avoid prolonged parking: The battery installed in the car will self-discharge over time when left unused. It is best to drive the car at least once a week, preferably for more than 20 minutes, to allow the battery to recharge while driving. Close windows before turning off the engine: The power for operating car windows and sunroofs comes from the battery. Therefore, it is best to close all windows before turning off the engine, rather than after, or even using the long-press lock button method to close windows after leaving the car. Keep the battery clean and tidy: Regular inspections are an effective way to extend the lifespan of a car battery. Use a professional battery electrode brush or an old toothbrush to clean dust and corrosion from the battery's positive and negative terminals. Applying a layer of Vaseline or grease to the contact surfaces can form a protective film.
It's best to choose a new battery with a manufacturing date no older than six months. Based on my experience of driving for over a decade and replacing several batteries, prolonged storage leads to aging of internal chemical components and self-discharge, significantly reducing performance. For instance, last year I purchased a battery that had been in storage for eight months, and it struggled to start within three months—fortunately, it was replaced under warranty. Professionals advise checking the date label on the packaging when purchasing, preferably selecting one within 180 days. Additionally, storage conditions should be cool and dry to avoid extreme temperatures accelerating deterioration. Regularly testing voltage with a multimeter is also a good practice; maintaining it above 12V ensures optimal reliability for driving safety.
