How many days can a car battery be stored after being fully charged?
2 Answers
After being fully charged, a car battery can be stored for up to one month. Here are the specific details about car batteries: 1. Function: The battery's role is to store electrical energy. Without a battery, the car cannot operate normally. 2. Charging while driving: The battery can be charged by the alternator while the car is running. If the car is parked for a long time, it can easily lead to battery discharge, making it impossible to start the car. Therefore, during long-term parking, it is best to start the vehicle at least once a week for more than 5 minutes to charge the battery. 3. Charging precautions: Generally, it takes 4-5 hours to fully charge a battery. Avoid overcharging.
After driving for so many years, I've encountered the issue of battery drainage several times. How many days can a fully charged battery last? Usually, it's manageable for two to three weeks, but beyond that, the risk increases significantly. The battery itself has a self-discharge problem, especially lead-acid batteries, which lose 5-10% of their charge per month. In high temperatures, such as a stuffy garage in summer, the discharge rate is even faster, and the voltage can drop below the safety line within a few weeks. For short-term storage, I recommend checking the voltage every two weeks to ensure it stays above 12.4V. In colder temperatures, this interval can be slightly extended. Also, the type of battery matters: AGM or lithium batteries can last longer, remaining safe for up to four weeks, whereas wet batteries can only manage about two weeks at most. To avoid losses during long-term storage, it's best to disconnect the negative terminal cable or use a smart charger for periodic top-ups. Storing for more than a month requires caution, as it can easily lead to battery failure. Regular maintenance can save both hassle and money.
