Stop Voltage: 2.9V for BAT discharging
Efficiency: 85% discharging efficiency, ideal for 3.7V to 5V conversion
Indications: Clear charging and discharging status with LED indications
Power MOS: Internally installed for efficient power management
Voltage Precision: Preset 4.2V with ±1% precision for safe charging
Standby Efficiency: Low 8uA current, exceedingly power-efficient
Management: Integrated charging and discharging management systems
Protection: Total protection with temperature and overvoltage safety
Zero Voltage Charging: Supports trickle mode, ideal for low voltage charging

Current Protection Features built-in circuitry to prevent overcurrent issues.
Reverse Polarity Protection Safeguard your devices from incorrect battery orientation.
LED Indicators Red light means charging, green light when fully charged.
Compact Design Small footprint makes it perfect for tight spaces in DIY projects.
Automatic Recharge Automatically resumes charging upon detecting a drop in voltage.