Specifications :
USB Output: 5V 2.1A / 5V 1A(Dual USB interface)
Charging display: intelligent digital display
Batteries Type: liquid lithium-ion batteries (18650) 3.7 lithium-ion batteries only
Protection circuit: Overcharge protection: 4.250V Overcharge protection release: 4.100V
Protection circuit: Over-discharge protection: 2.900V Over-discharge protection release: 3.000V
Idle time before LCD switch off: 60secs.