The portable power station has built-in over charge protection, over discharge protection, overload protection, short circuit protection and other safety protection functions. Overcharge protection can prevent the battery from being damaged during charging due to high charging voltage or long charging time; Overdischarge protection can avoid battery overdischarge and affect battery life; Overload protection Automatically cuts off the output when the power of the connected equipment exceeds the rated power of the power station to prevent damage to the power station and equipment; Short-circuit protection quickly cuts off the circuit when the output line is short-circuited to avoid safety accidents.