3.7V Li-ion Battery Mini USB To USB A Power Supply Module 5V 1A Charger Module
Features:
This PCB also support charging the battery， simply supply a 5V micro USB source to the charging input and it will charge the connected battery to 4.2V.Great for mobile power source using Lithium ion batteries (unprotected is also ok).Connect multiple batteries to the battery input to increase the capacity power capacity.With iphone recognition circuit， can charge iPhone.
Protection Circuit:
Overcharge protection: 4.3VOvercharge protection release: 4.1VOverdischarge protection: 2.9VOverdischarge protection release: 3V
Specification:
Charging voltage input: 5V 1AStep up voltage output: 5V 1A maxTransient current: 180uARed LED: ChargingGreen LED: Charging completedBlue LED: There is a load in the USBSize: 50 x 20 x 9 mm
Package include:
1 x USB DC 5V power supply