An ideal diode is an electronic circuit that allows current to flow only in one direction. It is placed on the battery’s positive lead to prevent current from flowing back into the battery. It is commonly used for parallel battery configurations. When two batteries with different voltages are connected in parallel, the one with higher voltage may begin to charge the lower one with uncontrolled current. An ideal diode prevents this, making parallel connections with different voltages safe.
Compared to a standard diode, an ideal diode has a lower voltage drop, making it suitable for higher currents. This version can handle up to 60A without a heatsink.
An ideal diode is essential when performing hot-swapping of batteries—replacing the battery without shutting down the drone. This is especially critical for cinema drones where the camera is powered by the main flight battery. The 60A version is suitable for powering 5–8" freestyle and long-range drones. If higher current is needed, it is recommended to attach a heatsink to the diode or use two modules in parallel.