5PCS 5V Boost Step Up Power Module Lithium LiPo Battery Charging Protection Board LED Display USB for DIY Charger 134N3P Program(MICRO interface)

Charge and discharge status indication
Built-in charging and discharging power MOS
Input voltage: 3.7V ~ 5.5V
Charging current: up to 1A
Output current: up to 1A
Output voltage: 5V
BAT discharge termination voltage: 2.9V
Preset 4.2V charging voltage with an accuracy of 1%
Discharge efficiency: 85% (input 3.7V, output 5V/1A)
Maximum 8uA standby current
Integrated charge management and discharge management
Intelligent temperature control and over temperature protection
Integrated output overvoltage protection, short circuit protection, heavy duty protection
Integrated overcharge and overdischarge protection
Supports turbulence mode and zero voltage charging