5V Step-Up Power Module Lithium Battery Charging Protection Board USB

5V Step-Up Power Module Lithium Battery Charging Protection Board USB For DIY Charger 134N3P 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 overtemperature protection 7.Integration output overvoltage protection,short coircuit protection,overload protection 8.Integration overcharging and overdischarging protection 9.Support trickle mode and zero voltage charging When charging :red light flashing Full charged :red light light for a long time Category: CHARGERs