5V Step-Up Power Module Lithium Battery Charging Protection Board USB For DIY Charger 134N3P

Specification: 1. Charging and discharging indication, based on advanced HT4928S IC 2. Internally installed charging and discharging power MOS 3. Preset 4.2V charging voltage, precision ±1% 4. Max 8uA standby current 5. Intelligent charging management and discharging management 6. Intelligent temperature control and over-temperature protection 7. Intelligent output over-voltage protection,short circuit protection,overload protection 8. Intelligent overcharging and over-discharging protection 9. Support trickle mode and zero voltage charging 10. Auto ON/OFF with load detection LED Light Indicator: Charging: When charging the battery, Red LED flash ON and OFF Discharge: Red LED ON and starts flashing when battery voltage drops below 3.2V (low battery) and it shuts down automatically when battery voltage reaches 2.95V This is also known as power bank module | power bank jack Important Note: The module can get quite hot during charging and discharging, it is absolutely normal and does not affect performance or safety in any way.