Description Description 1.Input Voltage:3.7V~5.5V 2.Charging Current:1A(max) 3.Output Current:1A(max) 4.Output voltage:5V 5.BAT Discharging Stop Voltage:2.9V 6.Discharging Efficiency:85%(input 3.7V output 5V/1A)   Features: 1.Charging and discharging indication 2.Internally installed charging and discharging power MOS 3.Preset 4.2V charging voltage, precision ±1% 4.Max 8uA standby current 5.Integration charging management and discharging management 6.Intelligent temperature control and over temperature protection 7.Integration output over voltage protection,short circuit protection,overload protection 8.Integration overcharging and over discharging protection 9.Support trickle mode and zero voltage charging When charging :red light flashing Full charged :red light light for a long time Package Included 1 Pcs 5V Step-Up Power Module