Light status: no light when no load, red light when charging, green light when full. Note: charging with 5V when the battery is first connected will activate the protection circuit.
18650 Battery Holder:18650 battery holder with cables are tin plated, the black and red two wire design is great for easy soldering and connecting.
Input port: 20 pieces TP4056 micro USB socket, which can be used directly as an input to charge the lithium battery with a mobile phone charger.
Input voltage: 4.5 - 5.5 V (recommended voltage 5 V); final charging voltage: 4.2 V +/-1.5%. Charging current: 1A standard However, you can change this by changing the resistor 1k2 next to the "IN" pad at the bottom left of the board. Note: reverse connection is not allowed.
Package includes: 4 x 18650 battery compartment; 20 x TP4056 micro USB charging module.