These days, because of recent Tesla issues, many people say things like “using cylindrical cells was a mistake” or “Tesla had no choice but to use them.” That might have been true long ago when prismatic and pouch cells were not widely available. But even today, choosing a cell type is far from a simple decision. In battery pack design, there is always a trade-off. Safety, energy density, manufacturing complexity, and cost are all interconnected, and the outcome depends on wh

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