C-rating indicates a battery’s maximum safe continuous discharge rate. The formula is:
Maximum Current = Capacity (Ah) × C-rating
For example, a 2000mAh (2Ah) battery with 50C rating can safely deliver up to 100A continuous current (2 × 50 = 100). Higher C-ratings are essential for:
- Aggressive flying styles
- Larger propellers
- More powerful motors
- Better acceleration
Most photography drones use batteries with 15-25C ratings, while racing drones often require 75C or higher. Always choose a C-rating that matches your drone’s power requirements to prevent battery damage and ensure optimal performance.
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Last Updated: September 23, 2025
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