Below are two Tesla charging examples. Both show cell voltage behavior during charging. The difference becomes clear near the upper SOC range. One case shows balancing recovery.The other shows a condition where balancing can no longer recover the imbalance. Case 1: Balancing Recovers In the first graph, look at the circled area near high SOC. As charging progresses, the thickness of the cell voltage band becomes thinner. The spread between the highest and lowest cells gradual

People use their batteries very differently. Some may only consume 10% in a day, others 50%, and some even require more than a full charge daily. So why does Tesla set 80% as the default charging limit for most users? From a battery health perspective, 50% state of charge is actually the most stable. But if a manufacturer simply told users to "keep your battery around 50%," most people would find that confusing and difficult to apply in real life. That’s why 80% has become th