5V Step-Up Power Bank Charging Module Lithium Battery Charging Protection Board USB For DIY Charger 134N3P Lithium Battery Charging Protection Board Boost Converter LED Display USB For DIY Charger 134N3P High-Quality usb iron with Cheap display port video card and Integrated Circuits. Input Voltage:3.7V~5.5V Charging Current:1A(max) Output Current:1A(max) Output voltage:5V Dimensions: 23 x 18 x 10 mm (LxWxH) Weight: 3 gm BAT Discharging Stop Voltage:2.9V Discharging Efficiency:85% (input 3.7V output 5V/1A) Charging and discharging indication Internally installed charging and discharging power MOS Preset 4.2V charging voltage, precision ±1% Max 8uA standby current Integration charging management and discharging management Intelligent temperature control and overtemperature protection Integration output overvoltage protection, short circuit protection, overload protection Integration overcharging and over-discharging protection Support trickle mode and zero voltage charging When charging: red light flashing Full charged: Red light glows for a long time
