How Often Should Lithium Batteries Be Replaced?
2 Answers
Lithium batteries have a service life of 3 to 5 years. Currently, automotive batteries on the market are mainly divided into two types: lead-acid batteries and lithium batteries. The basic service life of lead-acid batteries is 3 years. It is worth noting that the service life of lead-acid batteries can be extended by another two to three years through maintenance. Lead-acid batteries require regular maintenance, while lithium batteries do not and cannot be maintained. Automotive lithium batteries are the power batteries for hybrid and electric vehicles. As some technical performance indicators of nickel-metal hydride batteries, such as energy density and charge-discharge rates, have approached their theoretical limits, lithium batteries are favored for their high energy density, large capacity, and no memory effect. Lithium batteries can be stored in a clean, dry, and well-ventilated indoor environment with a temperature range of -5°C to 35°C and relative humidity not exceeding 75%. They should be kept away from corrosive substances, fire sources, and heat sources. The battery charge should be maintained at 30% to 50% of its nominal capacity. During charging and discharging, lithium-ion batteries generate heat. If the heat generated exceeds the battery's heat dissipation capacity, the lithium-ion battery will overheat, leading to destructive side reactions such as decomposition of the SEI film, electrolyte decomposition, cathode decomposition, reactions between the anode and electrolyte, and reactions between the anode and binder.
I've been driving an electric vehicle, and lithium battery replacement isn't fixed—it typically lasts about 8 to 10 years, but the key is how you use the car. For example, I drive a lot, commuting over a hundred kilometers daily, so the battery degrades faster, and I might notice a significant drop in range after just 6 years. Both cold and hot weather affect battery life—avoid leaving the car exposed to extreme heat in summer, and don’t store it at full charge for too long. I once saw a neighbor’s battery swell. For maintenance, I recommend regular capacity checks at the 4S shop; if it drops below 80%, it’s time to consider a replacement. Driving habits also matter—sudden acceleration and braking waste battery life. I usually maintain steady throttle control to extend battery longevity. Don’t wait until it fails completely—planning ahead saves hassle and money.
