jetson nano powering problems

jetson only boot up with short cable from power bank ( mi - 2.5 ah ).
if we use barrel jack , it boots up normally.
Is there any way to run nvidia jetson with lower current ( less than 2 A ) ?
while using hdmi ; some times it boots some times it hangs .

Hi, please refer to “Other Power Supply Option” in user guide https://developer.nvidia.com/embedded/dlc/jetson-nano-dev-kit-user-guide, the current is due to peripherals attached to the carrier board.