BT2.0 is a connector developed by BetaFPV specifically for 1S TinyWhoops. Compared to the previously used PH2.0 connector, it has significantly lower resistance and reduced voltage drop, which allows for higher current delivery and improves the overall performance of the model. BT2.0 is designed for loads up to 9A, making it suitable even for more aggressive flying styles and providing stable power under higher loads.