... about 4 hours.With 4 LED battery indicator and a battery test switch, real-time check the battery ... 5V; 5. Output current: ≤1A Battery indicator: Press the battery test switch, power on, LED light indicates that ... is 5V output voltage output. Then press the test switch ≥ 3 seconds, the power is off. ... will automatically enter standby mode. Press the battery test switch, such as the battery pack charge ...