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  • Don't use the Arduino 5V pin to power motors. Use the battery voltage for the driver. Did you confuse Vcc1 and Vcc2 ? Pin 8 is Vcc2 is the motor power. Pin 16 is Vcc1 is the logic 5V voltage. As @jose-can-u-c wrote, you need a better battery and a there are better mosfet drivers. With your battery it is amazing that it lasts as long 30 seconds. Commented Dec 14, 2017 at 22:46