Brand: Other Type: Electronic Accessories Module Power Bank With Dual USB 5V 2A and LED lamp Input Parameter: 5V/1A Input Interface: micro USB Output Interface: dual USB output: 5V/2A Conversion Rate: 90% average Module does not need battery protection board as it has inbuilt battery protection system. Installation Introduction: Circuit board B- connects power negative B+ connects positive. Don't inversely connect, it will result in burning of board. Make sure there is insulation between power and circuit when install the battery Press and hold the switch, flashlight LED light starts, then press and hold to turn it off 2A output is not continuous current, it changes according to USB connecting load, automatic current output as per load If battery is connected incorrectly, the reverse polarity will burn the circuit. So, make sure to check the battery polarity when connecting. Special Instruction: When connecting the board for the first time, connect the battery and then connect the micro USB charger and charge the battery to full capacity before using. Size: Width 2.6cm - length 6.9cm.