TechSupreme Dual USB 5V 1A 2A Power Bank Charging Module with Digital Display 1B Electronic Components Electronic Hobby Kit

This is the circuit board to make a power bank. Designed to meet the individual needs of DIY power bank. Motherboard comes with protection function: Charging overcharge protection Over-discharge protection Overcurrent protection Intelligent output device after charging full Automatically stop charging, to prevent mobile phones overcharge Output voltage and current stable, will not harm user devices Specifications: Micro USB input: 5V 1A USB Output: 5V 2.1A / 5V 1A(Dual USB interface) Charging display: intelligent digital display Batteries Type: Any lithium-ion batteries Product Size: 57mm x 28mm Screen size:27mm x 17mm Installation instructions: The circuit board is connected to the battery negative B-, B + is the positive Do not connect reverse, connecting reversed will burn the board Note: There should be proper insulation between the battery and the circuit board No battery lead should touch the circuit board, so as not to cause a short circuit. Package included: 1 x Mobile Power Bank 18650 Battery Charging Circuit Board with Digital Display.