How Often Should New Energy Vehicle Batteries Be Replaced?

[VonReed]

Qualified ternary lithium batteries typically have a normal service life of 8 years, with a specific driving range of 150,000 to 200,000 kilometers. If either of these thresholds is reached, the battery must be replaced. Below are methods for assessing the capacity of new energy vehicle batteries: Battery Capacity: The current battery capacity SOC (State of Charge) of the vehicle is equal to remaining charge/usable capacity × 100%. However, these values are generally measured indirectly through the ampere-hour integration method, which still carries significant errors. Moreover, as the battery degrades, these errors tend to increase. Power Battery: For power batteries, discharge capabilities vary under different temperatures. For instance, usable capacity refers to the maximum charge (AH) the battery can store in its current state. This value constantly changes, with the most obvious factor being aging. Over time and with increasing charge-discharge cycles, the usable capacity gradually diminishes.

[RhettDella]

I've been driving a new energy vehicle for five years, and experience tells me that the battery typically lasts 8 to 10 years. It's not calculated by mileage, but rather depends on how you use it and your charging habits. I drive a BYD Han, and now the degradation is less than 8%. The key lies in gentle driving and mainly using slow charging. Although fast charging is convenient, frequent use accelerates aging; temperature has a big impact, so in summer, park in the shade to avoid overheating. If the range drops below 70%, it's time to check and replace it. I use an APP to check the health status every six months. I recommend new owners to perform regular maintenance to extend battery life and save both worry and money.

[Simoes]

After years of repairing cars, I've found that the lifespan of new energy vehicle batteries generally starts at 8 years, with premium brands like Tesla or NIO even guaranteeing up to 10 years. Replacement timing depends on degradation rate - aggressive driving habits such as hard acceleration or frequent fast charging can accelerate battery deterioration. The testing method is simple: when the full-charge range drops noticeably by 15-20%, it's time to consider replacement. Battery replacements are usually free during warranty period, but costs over 10,000 yuan out of warranty. I recommend owners not neglect cooling system maintenance as it helps prevent premature failures.

[Alexia]

I chose a new energy vehicle for environmental reasons. The battery lifespan generally ranges from 8 to 10 years, with influencing factors including charging frequency and ambient temperature. Try to avoid deep discharges, and maintaining the battery level between 30-80% is the healthiest. The replacement timing depends on performance degradation—address it promptly when the pure electric range shrinks, don't wait until safety risks arise. Recycling and reusing old batteries is a sustainable step, extending usage cycles and reducing waste, aligning with the concept of green mobility.