This is the Mobile Power Boost DIY 18650 Lithium Battery Digital Dual USB mobile power module Accessories, 18650 Circuit board shell. Meet the individual needs of your DIY, but you must understand basic electronic assembly. The motherboard comes with protection 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 stability, will not harm user devices.

Features:

• 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.