Mastering FPV Drone Battery Voltage Sag: From Causes to Perfect Solutions
Photo by Kyle Loftus on Unsplash Have you ever experienced a sudden drop in your drone's performance within seconds during an FPV flight? It feels like the battery is dead, but the OSD voltage gauge shows it's still sufficient. This is FPV drone battery voltage sag . This critical voltage drop is the main culprit that prevents seemingly healthy batteries from delivering your drone's maximum performance. This post will delve into the causes of battery sag, which plagues FPV drone enthusiasts, and provide detailed, effective diagnostic and resolution methods. What is FPV Drone Battery Voltage Sag? FPV drone battery voltage sag is a phenomenon where the voltage drops sharply when a large current momentarily flows through a LiPo battery. This occurs due to the battery's internal resistance and is more pronounced in situations requiring high current (e.g., rapid acceleration, sharp turns). For example, a 4S LiPo battery with a nominal voltage of 14.8V can drop belo...