134N3P 5V Step-up Lithium Battery Charging Protection Board

Input Voltage: 3.7V~5.5V

Charging Current: 1A
Output Current: 1A
Output Voltage: 5V
BAT Discharge Termination Voltage: 2.9V
Preset 4.2V Charge Voltage with ±1% accuracy
Discharge Efficiency: 85% (input 3.7V, output 5V/1A)