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

Features:
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