The C-rating indicates how quickly a battery can safely discharge its capacity:
A battery rated at 30C with 2000mAh capacity can deliver: 30 × 2000mA = 60,000mA (60A) continuously. Higher C-ratings are crucial for:
However, higher C-ratings typically mean shorter flight times. Photography drones often use 15-25C batteries for better efficiency, while racing drones need 75C+ for optimal performance. Always match the C-rating to your drone's power requirements.