Tesla can use the motor to warm the battery itself. In this case, about 4% of the battery was used just to raise battery temperature. Tesla does this to protect the battery. So if you ever notice a small battery drop without driving, it’s not a problem. It’s simply the car taking care of its battery.

When comparing Tesla charging data, an interesting pattern appears. Under similar charging currents, NCM batteries heat up more, while LFP batteries stay noticeably cooler. At first glance, this looks counter-intuitive. LFP chemistry is well known for being more thermally robust.

After the recent UI update, Dr.EV has been showing battery degradation factors using numerical indicators. Some users mentioned that the numbers were difficult to interpret, so we added a new feature that explains these factors in clear, easy-to-read sentences. As always, we will continue analyzing the correlation between degradation and its influencing factors for each vehicle and refine the system over time. Additionally, based on user requests, we have added a detailed sta

The two charging graphs presented here are real data provided by a Korean user and a Chinese user who contacted us through the ‘Contact via Email’ feature in the Dr.EV app to inquire about their battery condition. All personal information has been removed, and only the necessary data has been used. First User (Left Graph) The user on the left performs almost all charging using DC fast charging.They frequently charge to 100 percent, and their daily charging routine also depend

This experiment is based on a user scenario in which a vehicle that is already out of warranty shows BMS a079 symptoms, and the owner tries to continue using the car as stably as possible while accepting a certain level of inconvenience. It has now been five weeks since the BMS a079 phenomenon was first detected. So far, the BMS a079 error code has still never appeared. At around week 3, the battery condition worsened slightly. So, we limited the charging level to 60% and cap

This experiment is based on a user scenario in which a vehicle that is already out of warranty shows BMS a079 symptoms, and the owner tries to keep using the vehicle as stably as possible while accepting a certain level of inconvenience. This is the third-week result since the first detection of the BMS a079 phenomenon. So far, the BMS a079 error code has not actually occurred. In last week’s middle graph, the cell voltage deviation widened up to 0.09 V. Starting this week, h

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

I recently came across a post on Reddit’s DrEVdev where someone cited an article claiming that Tesla Supercharging is not related to battery degradation. I will not specify the original source here. Collecting and analyzing such data is not an easy task, and I have no intention of criticizing the author. However, since the article has been widely referenced in blogs and YouTube videos, leading some people to believe that fast charging has no relation to battery degradation, I

Although we have analyzed numerous user datasets and real-world cases, this is the first time we have personally observed the same issue on our own vehicle. This gives us a valuable opportunity to study the problem not only from the developer’s perspective but also as an actual owner experiencing it firsthand. To share some background: the vehicle was purchased used in June of last year with about 120,000 km. It has mainly been used for development, and the annual mileage is

If you think of it as not letting any water droplets spill outside the cup, it becomes easier to understand why charging slows down...

You’ve probably heard EV owners throw around the phrase “ABC:  Always Be Charging.” But what does it really mean? It’s not just “plug in...

Many consumers judge the condition of a used car only by age and mileage. However, for electric vehicles, the most accurate indicator of...

Model Y: In this graph, the battery heater does not activate. The temperature rise is gradual and caused only by the thermal load from...

As many of you may already know, Tesla’s manual recommends limiting regular use of NCA/NCM batteries to 80% state of charge. The...

This method is intended to reassure owners who may be worried about BMS a079 even without visible symptoms, and to help used car buyers...

Previously, you could only review data from your most recent session . Now, we’ve expanded the feature so you can analyze battery and...

Some owners believe that the battery management system (BMS) is designed solely to maximize battery life. In reality, this is not the...