Is it normal for BYD batteries to degrade without needing replacement?
2 Answers
Replacement is necessary. The standard for BYD battery replacement due to degradation is as follows: If the battery capacity falls below 66% of the standard capacity, a new battery can be directly replaced. Below is an extended introduction: 1. Conditions for battery replacement: The core components of BYD new energy vehicles come with an 8-year or 150,000-kilometer warranty, while the battery cells are covered by a lifetime warranty. As long as the battery capacity drops below 66% of the standard capacity, a new battery can be directly replaced. 2. Introduction to the battery: The term "battery cell" is used instead of "battery" because a battery pack consists of multiple components such as the casing, wiring, power management system, cooling system, and battery cells. The battery cells are responsible for energy storage, while the other components are auxiliary. Other auxiliary components fall under the vehicle's three-guarantee policy. As long as the battery pack has not been manually disassembled, the entire battery will be replaced. After the warranty period expires, the battery cells can be replaced for free, but the costs associated with replacing the battery cells, including the repackaging of the battery pack, replacement of circuits and circuit boards, and labor costs, are borne by the user.
I've been driving a BYD Han for three years and feel the battery is like a smartphone battery—normal degradation doesn't warrant an urgent replacement. Developing good habits is crucial, such as avoiding frequent discharges below 10% before recharging, as that accelerates battery aging. Also, minimize the use of fast charging, as it harms the battery more than slow charging. When parked, try to avoid prolonged exposure to direct sunlight, as high temperatures significantly damage lithium batteries. Currently, my car's range has dropped from 600 km to around 560 km, which is still perfectly sufficient for daily use, making a battery replacement an unnecessary expense. Battery lifespan is closely tied to usage frequency—weekly drives versus daily long-distance trips will result in different wear levels, but both fall within the normal degradation range covered by the warranty. BYD's after-sales service has professional equipment for testing. If you encounter abnormal rapid power loss, the dealership will handle it free of charge.
